Fix various lint warnings in manuals

Fix "new sentence, new line" warnings throughout so that formatters
can produce correct spacing between sentences.

join.1
  Remove unnecessary Ns macros. These are not necessary for delimeters,
  which get special treatment.

xinstall.1
  Fix date in manual. The contents were last modified on 2016-12-03,
  so use that instead of the invalid date.

grep.1
  Fix escape sequence for `\<` and `\>`.

ed.1
  Remove spurious `\\n` escape for the null-command.

cal.1

@@ -27,18 +27,20 @@ year to stdout.
 The date formatting is according to
 .Xr localtime 3 .
 .Pp
-The Julian calendar is used until Sep 2, 1752. The Gregorian calendar is used
+The Julian calendar is used until Sep 2, 1752.
-starting the next day on Sep 14, 1752.
+The Gregorian calendar is used starting the next day on Sep 14, 1752.
 .Sh OPTIONS
 .Bl -tag -width Ds
 .It Fl 1
-Print current month. This is the default.
+Print current month.
+This is the default.
 .It Fl 3
 Print previous, current and next month.
 .It Fl c Ar num
 Print
 .Ar num
-calendars in a row. The default is 3.
+calendars in a row.
+The default is 3.
 .It Fl f Ar num
 Set
 .Ar num

cat.1

@@ -12,7 +12,8 @@
 .Nm
 reads each
 .Ar file
-in sequence and writes it to stdout. If no
+in sequence and writes it to stdout.
+If no
 .Ar file
 is given
 .Nm

chgrp.1

@@ -34,7 +34,8 @@ if it is a symbolic link.
 .It Fl L
 Dereference all symbolic links.
 .It Fl P
-Preserve symbolic links. This is the default.
+Preserve symbolic links.
+This is the default.
 .El
 .Sh SEE ALSO
 .Xr chmod 1 ,

chmod.1

@@ -69,7 +69,8 @@ if it is a symbolic link.
 .It Fl L
 Dereference all symbolic links.
 .It Fl P
-Preserve symbolic links. This is the default.
+Preserve symbolic links.
+This is the default.
 .El
 .Sh SEE ALSO
 .Xr chgrp 1 ,

chown.1

@@ -45,7 +45,8 @@ if it is a symbolic link.
 .It Fl L
 Dereference all symbolic links.
 .It Fl P
-Preserve symbolic links. This is the default.
+Preserve symbolic links.
+This is the default.
 .El
 .Sh SEE ALSO
 .Xr chmod 1 ,

cmp.1

@@ -14,7 +14,8 @@ compares
 .Ar file1
 and
 .Ar file2
-byte by byte. If they differ,
+byte by byte.
+If they differ,
 .Nm
 writes the first differing byte- and line-number to stdout.
 .Sh OPTIONS

cols.1

@@ -24,8 +24,8 @@ reads from stdin.
 .Pp
 By default
 .Nm cols
-tries to figure out the width of the output
+tries to figure out the width of the output device.
-device. If that fails, it defaults to 65 chars.
+If that fails, it defaults to 65 chars.
 .Sh OPTIONS
 .Bl -tag -width Ds
 .It Fl c Ar num

cp.1

@@ -27,7 +27,8 @@ has to be a directory.
 .Sh OPTIONS
 .Bl -tag -width Ds
 .It Fl a
-Preserve block devices, character devices, sockets and FIFOs. Implies
+Preserve block devices, character devices, sockets and FIFOs.
+Implies
 .Fl p ,
 .Fl P
 and
@@ -55,8 +56,8 @@ Preserve symbolic links.
 This is the default with
 .Fl R .
 .It Fl R
-Traverse directories recursively. If this flag is not specified, directories
+Traverse directories recursively.
-are not copied.
+If this flag is not specified, directories are not copied.
 .El
 .Sh SEE ALSO
 .Xr mv 1

cut.1

@@ -33,9 +33,10 @@ reads from stdin.
 .Pp
 .Ar list
 is a comma or space separated list of numbers and ranges starting
-from 1. Ranges have the form 'N-M'. If N or M is missing,
+from 1.
-beginning or end of line is assumed. Numbers and ranges
+Ranges have the form 'N-M'. If N or M is missing, beginning or end
-may be repeated, overlapping and in any order.
+of line is assumed.
+Numbers and ranges may be repeated, overlapping and in any order.
 .Pp
 Selected input is written in the same order it is read
 and is written exactly once.
@@ -47,16 +48,17 @@ specifies byte | character positions.
 .It Fl d Ar delim
 Use
 .Ar delim
-as field delimiter, which can be an arbitrary string. Default is '\et'.
+as field delimiter, which can be an arbitrary string.
+Default is '\et'.
 .It Fl f Ar list
 .Ar list
-specifies field numbers. Lines not containing field
+specifies field numbers.
-delimiters are passed through, unless
+Lines not containing field delimiters are passed through, unless
 .Fl s
 is specified.
 .It Fl n
-Do not split multibyte characters. A character is written when its
+Do not split multibyte characters.
-last byte is selected.
+A character is written when its last byte is selected.
 .It Fl s
 Suppress lines not containing field delimiters.
 .El

date.1

@@ -41,8 +41,8 @@ sign signals a user-defined format string using
 conversion specifications.
 .Pp
 An operand without a leading plus sign is interpreted as a value
-for setting the system's current date and time. The canonical
+for setting the system's current date and time.
-representation for setting the date and time is:
+The canonical representation for setting the date and time is:
 .Pp
 .Bl -tag -width Ds -compact -offset indent
 .It Ar mm
@@ -65,12 +65,14 @@ is not, a value for
 .Ar yy
 between 69 and 99 results in a
 .Ar CC
-value of 19. Otherwise, a
+value of 19.
+Otherwise, a
 .Ar CC
 value of 20 is used.
 .El
 .Pp
-The century and year are optional. The default is the current year.
+The century and year are optional.
+The default is the current year.
 .Sh STANDARDS
 The
 .Nm

du.1

@@ -18,7 +18,8 @@
 displays the file system block usage for each
 .Ar file
 argument and for each directory in the file hierarchy rooted in directory
-argument. If no
+argument.
+If no
 .Ar file
 is specified, the block usage of the hierarchy rooted in the current directory
 is displayed.
@@ -43,7 +44,8 @@ recursively traversing directories.
 .It Fl L
 Always dereference symbolic links while recursively traversing directories.
 .It Fl P
-Don't dereference symbolic links. This is the default.
+Don't dereference symbolic links.
+This is the default.
 .It Fl x
 Do not traverse file systems mount points.
 .El

ed.1

@@ -11,15 +11,17 @@
 .Op Ar file
 .Sh DESCRIPTION
 .Nm
-is the standard text editor. It performs line-oriented operations on a buffer;
+is the standard text editor.
-The buffer's contents are manipulated in command mode and text is written to the
+It performs line-oriented operations on a buffer; The buffer's contents are
-buffer in input mode. Command mode is the default. To exit input mode enter a
+manipulated in command mode and text is written to the buffer in input mode.
-dot ('.') on a line of its own.
+Command mode is the default.
+To exit input mode enter a dot ('.') on a line of its own.
 .Pp
 If
 .Nm
 is invoked with a file as an argument, it will simulate an edit command and read
-the file's contents into a buffer. Changes to this buffer are local to
+the file's contents into a buffer.
+Changes to this buffer are local to
 .Nm
 until a write command is given.
 .Pp
@@ -37,10 +39,11 @@ as a prompt when in command mode
 .El
 .Sh EXTENDED DESCRIPTION
 .Ss Addresses
-Commands operate on addresses. Addresses are used to refer to lines
+Commands operate on addresses.
-within the buffer. Address ranges may have spaces before and after the separator.
+Addresses are used to refer to lines within the buffer.
-Unless otherwise specified, 0 is an invalid address. The following symbols are
+Address ranges may have spaces before and after the separator.
-valid addresses:
+Unless otherwise specified, 0 is an invalid address.
+The following symbols are valid addresses:
 .Bl -tag -width Ds
 .It n
 The nth line.
@@ -57,11 +60,11 @@ The previous line.
 .It ^n or -n
 The nth previous line.
 .It x,y
-The range of lines from x to y. The default value of x is 1, and the default
+The range of lines from x to y.
-value of y is $.
+The default value of x is 1, and the default value of y is $.
 .It x;y
-As above, except that the current line is set to x. Omitting x in this case uses
+As above, except that the current line is set to x.
-the current line as the default value.
+Omitting x in this case uses the current line as the default value.
 .It /re/
 The next line matching re.
 .It ?re?
@@ -69,82 +72,94 @@ The last line matching re.
 .It 'c
 The line marked by c. See k below.
 .El
-.Ss Commands.
+.Ss Commands
 .Nm
 expects to see one command per line, with the following exception: commands may
-be suffixed with either a list, number, or print command. These suffixed
+be suffixed with either a list, number, or print command.
-commands are run after the command they're suffixed to has executed.
+These suffixed commands are run after the command they're suffixed to has
+executed.
 .Pp
 The following is the list of commands that
 .Nm
-knows about. The parentheses contain the default addresses that a command uses.
+knows about.
+The parentheses contain the default addresses that a command uses.
 .Bl -tag -width Ds
 .It (.)a
-Append text after the addressed line. The dot is set to the last line
+Append text after the addressed line.
-entered. If no text was entered, the dot is set to the addressed line. An
+The dot is set to the last line entered.
-address of 0 appends to the start of the buffer.
+If no text was entered, the dot is set to the addressed line.
+An address of 0 appends to the start of the buffer.
 .It (.,.)c
-Delete the addressed lines and then accept input to replace them. The dot
+Delete the addressed lines and then accept input to replace them.
-is set to the last line entered. If no text was entered, the dot is set to
+The dot is set to the last line entered.
-the line before the deleted lines.
+If no text was entered, the dot is set to the line before the deleted lines.
 .It (.,.)d
-Delete the addressed lines. If there is a line after the deleted range, the
+Delete the addressed lines.
-dot is set to it. Otherwise, the dot is set to the line before the deleted range.
+If there is a line after the deleted range, the dot is set to it.
+Otherwise, the dot is set to the line before the deleted range.
 .It e Ar file
 Delete the contents of the buffer and load in
 .Ar file
-for editing, printing the bytes read to standard output. If no filename is
+for editing, printing the bytes read to standard output.
-given,
+If no filename is given,
 .Nm
-uses the currently remembered filename. The remembered filename is set to
+uses the currently remembered filename.
+The remembered filename is set to
 .Ar file
 for later use.
 .It E Ar file
 As above, but without warning if the current buffer has unsaved changes.
 .It f Ar file
 Set the currently remembered filename to
-.Ar
+.Ar file
-file
 , or print the currently remembered filename if
-.Ar
+.Ar file
-file is omitted.
+is omitted.
 .It (1,$)g/re/command
-Apply command to lines matching re. The dot is set to the matching line before
+Apply command to lines matching re.
-command is executed. When each matching line has been operated on, the dot is
+The dot is set to the matching line before command is executed.
-set to the last line operated on. If no lines match then the dot remains
+When each matching line has been operated on, the dot is set to the last line
-unchanged. The command used may not be g, G, v, or V.
+operated on.
+If no lines match then the dot remains unchanged.
+The command used may not be g, G, v, or V.
 .It (1,$)G/re/
-Interactively edit the range of line addresses that match re. The dot is set to
+Interactively edit the range of line addresses that match re.
-the matching line and printed before a command is input. When each matching line
+The dot is set to the matching line and printed before a command is input.
-has been operated on, the dot is set to the last line operated on. If no lines
+When each matching line has been operated on, the dot is set to the last line
-match then the dot remains unchanged. The command used may not be a, c, i, g,
+operated on.
-G, v, or V.
+If no lines match then the dot remains unchanged.
+The command used may not be a, c, i, g, G, v, or V.
 .It h
 Print the reason for the most recent error.
 .It H
-Toggle error explanations. If on, the above behaviour is produced on all
+Toggle error explanations.
-subsequent errors.
+If on, the above behaviour is produced on all subsequent errors.
 .It (.)i
-Insert text into the buffer before the addressed line. The dot is set to the
+Insert text into the buffer before the addressed line.
-last line entered. If no text was entered, the dot is set to the addressed line
+The dot is set to the last line entered.
+If no text was entered, the dot is set to the addressed line
 .It (.,.+1)j
-Join two lines together. If only one address is given, nothing happens. The dot
+Join two lines together.
-is set to the newly joined line.
+If only one address is given, nothing happens.
+The dot is set to the newly joined line.
 .It (.)kc
 Mark the line with the lower case character c. The dot is unchanged.
 .It (.,.)l
-Unambiguously print the addressed lines. The dot is set to the last line written.
+Unambiguously print the addressed lines.
+The dot is set to the last line written.
 .It (.,.)m(.)
-Move lines in the buffer to the line address on the right hand side. An address
+Move lines in the buffer to the line address on the right hand side.
-of 0 on the right hand side moves to the start of the buffer. The dot is set to
+An address of 0 on the right hand side moves to the start of the buffer.
-the last line moved.
+The dot is set to the last line moved.
 .It (.,.)n
-Print the addressed lines and their numbers. The dot is set to the last line
+Print the addressed lines and their numbers.
-printed.
+The dot is set to the last line printed.
 .It (.,.)p
-Print the addressed lines. The dot is set to the last line printed.
+Print the addressed lines.
+The dot is set to the last line printed.
 .It P
-Toggle the prompt. Defaults to off, but is switched on if the -p flag is used.
+Toggle the prompt.
+Defaults to off, but is switched on if the -p flag is used.
 .It q
 Quit
 .Nm
@@ -155,22 +170,25 @@ As above, but without warning if the current buffer has unsaved changes.
 Read in
 .Ar file
 and append it to the current buffer, printing the bytes read to standard output.
-The currently remembered filename isn't changed unless it's empty. An address of
+The currently remembered filename isn't changed unless it's empty.
-0 reads the file into the start of the buffer.
+An address of 0 reads the file into the start of the buffer.
 .It (.,.)s/re/replacement/flags
-Substitute re for replacement in lines matching re. An & within replacement is
+Substitute re for replacement in lines matching re.
-replaced with the whole string matched by re. Backrefs can be used with the form
+An & within replacement is replaced with the whole string matched by re.
-\\n, where n is a positive non-zero integer. When % is the only character in
+Backrefs can be used with the form \\n, where n is a positive non-zero integer.
-replacement, it is substituted for the replacement string from the last
+When % is the only character in replacement, it is substituted for the
-substitute command. If a newline is part of replacement then the matched string
+replacement string from the last substitute command.
-is split into two lines; this cannot be done as part of a g or v command. If
+If a newline is part of replacement then the matched string is split into two
-flags contains an integer n, then the nth match is replaced. If flags contains
+lines; this cannot be done as part of a g or v command.
-g, all matches are replaced. The dot is set to the last line matched.
+If flags contains an integer n, then the nth match is replaced.
+If flags contains g, all matches are replaced.
+The dot is set to the last line matched.
 .It (.,.)t(.)
-As m, but copying instead of moving. The dot is set to the last line added.
+As m, but copying instead of moving.
+The dot is set to the last line added.
 .It u
-Undo the last change. The dot is set to whatever it was before the undone
+Undo the last change.
-command was performed.
+The dot is set to whatever it was before the undone command was performed.
 .It (1.$)v/re/command
 As with g, but operating on lines that don't match re.
 .It (1.$)V/re/
@@ -179,30 +197,36 @@ As with G, but operating on lines that don't match re.
 Write the addressed lines to
 .Ar file
 , overwriting its previous contents if the file exists, and print the number of
-bytes written. If no filename is given the currently remembered filename will be
+bytes written.
-used instead. The dot is unchanged.
+If no filename is given the currently remembered filename will be used instead.
+The dot is unchanged.
 .It (1,$)W Ar file
 As above, but instead of overwriting the contents of
 .Ar file
 the addressed lines are appended to
 .Ar file
 instead.
-.It (.+1)\\n
+.It (.+1)
-Print the addressed line. Sets the dot to that line.
+Print the addressed line.
+Sets the dot to that line.
 .It ($)=
-Print the line number of the addressed line. The dot is unchanged.
+Print the line number of the addressed line.
+The dot is unchanged.
 .It &
 Repeat the last command.
 .It ! Ar command
 Execute
 .Ar command
-using sh. If the first character of
+using sh.
+If the first character of
 .Ar command
-is '!' then it is replaced with the text of the previous command. An unescaped %
+is '!' then it is replaced with the text of the previous command.
-is replaced with the currently remembered filename. ! does not process escape
+An unescaped % is replaced with the currently remembered filename.
-characters. When
+! does not process escape characters.
+When
 .Ar command
-returns a '!' is printed. The dot is unchanged.
+returns a '!' is printed.
+The dot is unchanged.
 .El
 .Sh SEE ALSO
 .Xr sed 1 ,

expr.1

@@ -22,7 +22,8 @@ Let
 be a non-elemental expression and
 .Sy expr1 ,
 .Sy expr2
-arbitrary expressions. Then
+arbitrary expressions.
+Then
 .Sy expr
 has the recursive form
 .Sy expr = [(] expr1 operand expr2 [)].
@@ -76,8 +77,9 @@ against
 is anchored with an implicit '^'.
 .Pp
 You can't directly match the empty string, since zero matched characters
-resolve equally to a failed match. To work around this limitation, use
+resolve equally to a failed match.
-"expr X'' : 'X$' instead of "expr '' : '$'"
+To work around this limitation, use "expr X'' : 'X$' instead of "expr ''
+: '$'"
 .El
 .Sh EXIT STATUS
 .Bl -tag -width Ds

find.1

@@ -26,9 +26,9 @@ Dereference all symbolic links encountered.
 .El
 .Sh EXTENDED DESCRIPTION
 .Ar expression
-is a combination of the following primaries and boolean operators. In
+is a combination of the following primaries and boolean operators.
-the following descriptions the number n can be replaced by +n, n, or -n,
+In the following descriptions the number n can be replaced by +n, n, or
-to mean more than, exactly, or less than n respectively.
+-n, to mean more than, exactly, or less than n respectively.
 .Ss Primaries
 .Bl -tag -width Ds
 .It Fl name Ar pattern
@@ -40,14 +40,18 @@ True if the file belongs to a user for which getpwuid() returns NULL.
 .It Fl nogroup
 True if the file belongs to a group for which getgrgid() returns NULL.
 .It Fl xdev
-True. Do not enter directory on a different device.
+True.
+Do not enter directory on a different device.
 .It Fl prune
-True. Do not enter directory.
+True.
+Do not enter directory.
 .It Fl perm Ar mode
-True if permissions on the file match mode. Mode is a symbolic mode
+True if permissions on the file match mode.
-as used in chmod. A leading '-' in mode checks that at least all bits
+Mode is a symbolic mode as used in chmod.
-in mode are set in permissions for file. Without the leading '-' the
+A leading '-' in mode checks that at least all bits in mode are set in
-permissions for file must exactly match mode.
+permissions for file.
+Without the leading '-' the permissions for file must exactly match
+mode.
 .It Fl type Ar t
 True if file is of type specified by
 .Ar t .
@@ -96,22 +100,27 @@ True if file modified time is
 days.
 .It Fl exec Ar cmd [arg ...] \&;
 Execute cmd with given arguments, replacing each {} in argument list
-with the current file. True if cmd exits with status 0.
+with the current file.
+True if cmd exits with status 0.
 .It Fl exec Ar cmd [arg ...] {} +
-True. Add as many files as possible to argument list and execute when
+True.
-the list is full or all files have been found.
+Add as many files as possible to argument list and execute when the list
+is full or all files have been found.
 .It Fl ok Ar cmd [arg ...] \&;
 Prompt the user on each file encountered whether or not to execute cmd
-as with -exec. True if the user responds yes and cmd exits with status 0,
+as with -exec.
-false otherwise.
+True if the user responds yes and cmd exits with status 0, false
+otherwise.
 .It Fl print
-True. Print the path to the current file.
+True.
+Print the path to the current file.
 .It Fl newer Ar file
 True if the modification time of the current file is newer than that of
 the provided file.
 .It Fl depth
-True. Causes find to evaluate files within in a directory before the
+True.
-directory itself.
+Causes find to evaluate files within in a directory before the directory
+itself.
 .El
 .Ss Operators
 In order of decreasing precedence
@@ -121,15 +130,15 @@ True if expression is true.
 .It Ar \&! expression
 True if expression if false.
 .It Ar expression [ Fl a ] Ar expression
-True if both expressions are true. Second expression is not evaluated
+True if both expressions are true.
-if first expression is false.
+Second expression is not evaluated if first expression is false.
 .Fl a
 is implied if there is no operator between primaries.
 .It Ar expression Fl o Ar expression
-True if either expression is true. Second expression is not evaluated
+True if either expression is true.
-if first expression is true.
+Second expression is not evaluated if first expression is true.
 .El
 .Pp
-If no expression is supplied, -print is used. If an expression is supplied
+If no expression is supplied, -print is used.
-but none of -print, -exec, or -ok is supplied, then -a -print is appended
+If an expression is supplied but none of -print, -exec, or -ok is
-to the expressions.
+supplied, then -a -print is appended to the expressions.

flock.1

@@ -11,15 +11,17 @@
 .Ar cmd Op arg ...
 .Sh DESCRIPTION
 .Nm
-is used to manage advisory locks on open files.  It is commonly used to prevent
+is used to manage advisory locks on open files.
-long running cron jobs from running in parallel.  If
+It is commonly used to prevent long running cron jobs from running in
+parallel.
+If
 .Ar file
 does not exist, it will be created.
 .Sh OPTIONS
 .Bl -tag -width Ds
 .It Fl n
-Set non-blocking mode on the lock.  Fail immediately if the lock
+Set non-blocking mode on the lock.
-cannot be acquired.
+Fail immediately if the lock cannot be acquired.
 .It Fl o
 Close the file descriptor before exec to avoid having the exec'ed
 program holding on to the lock.
@@ -28,5 +30,6 @@ Acquire a shared lock.
 .It Fl u
 Release the lock.
 .It Fl x
-Acquire an exclusive lock.  This is the default.
+Acquire an exclusive lock.
+This is the default.
 .El

fold.1

@@ -28,7 +28,8 @@ at the last space within width.
 .It Fl w Ar num | Fl Ns Ar num
 Break at
 .Ar num
-characters. The default is 80.
+characters.
+The default is 80.
 .El
 .Sh STANDARDS
 The

grep.1

@@ -17,7 +17,8 @@ searches the input files for lines that match the
 .Ar pattern ,
 a regular expression as defined in
 .Xr regex 7 .
-By default each matching line is printed to stdout. If no
+By default each matching line is printed to stdout.
+If no
 .Ar file
 is given
 .Nm
@@ -27,11 +28,12 @@ reads from stdin.
 .It Fl E
 Match using extended regex.
 .It Fl F
-Match using fixed strings. Treat each pattern specified as a string instead of
+Match using fixed strings.
-a regular expression.
+Treat each pattern specified as a string instead of a regular
+expression.
 .It Fl H
-Prefix each matching line with its filename in the output. This is the
+Prefix each matching line with its filename in the output.
-default when there is more than one file specified.
+This is the default when there is more than one file specified.
 .It Fl c
 Print only a count of matching lines.
 .It Fl e Ar pattern
@@ -41,9 +43,10 @@ This option is most useful when multiple -e options are used to
 specify multiple patterns, or when a pattern begins with a dash.
 .It Fl f Ar file
 Read one or more patterns from the file named by the pathname file.
-Patterns in file shall be terminated by a <newline>. A null pattern can be
+Patterns in file shall be terminated by a <newline>.
-specified by an empty line in pattern_file. Unless the -E or -F option is
+A null pattern can be specified by an empty line in pattern_file.
-also specified, each pattern shall be treated as a BRE.
+Unless the -E or -F option is also specified, each pattern shall be
+treated as a BRE.
 (`-').
 .It Fl h
 Do not prefix each line with 'filename:' prefix.
@@ -63,7 +66,7 @@ Select lines which do
 .Sy not
 match the pattern.
 .It Fl w
-The expression is searched for as a word (as if surrounded by '\<' and '\>').
+The expression is searched for as a word (as if surrounded by '\\<' and '\\>').
 .It Fl x
 Consider only input lines that use all characters in the line excluding the
 terminating <newline> to match an entire fixed string or regular expression to

head.1

@@ -27,7 +27,8 @@ Display initial
 .Ar num
 |
 .Sy N
-lines. Default is 10.
+lines.
+Default is 10.
 .El
 .Sh SEE ALSO
 .Xr tail 1

join.1

@@ -19,8 +19,8 @@ lines from
 .Ar file1
 and
 .Ar file2
-on a matching field. If one of the input files is '-', standard input
+on a matching field.
-is read for that file.
+If one of the input files is '-', standard input is read for that file.
 .Pp
 Files are read sequentially and are assumed to be sorted on the join
 field.
@@ -31,9 +31,9 @@ produce unexpected output.
 By default, input lines are matched on the first blank-separated
 field; output lines are space-separated and consist of the join field
 followed by the remaining fields from
-.Ar file1 Ns ,
+.Ar file1 ,
 then the remaining fields from
-.Ar file2 Ns .
+.Ar file2 .
 .Sh OPTIONS
 .Bl -tag -width Ds
 .It Fl 1 Ar field
@@ -50,12 +50,12 @@ Print unpairable lines from file
 in addition to normal output.
 .It Fl e Ar string
 When used with
-.Fl o Ns ,
+.Fl o ,
 replace empty fields in the output list with
-.Ar string Ns .
+.Ar string .
 .It Fl o Ar list
 Format output according to the string
-.Ar list Ns .
+.Ar list .
 Each element of
 .Ar list
 may be either
@@ -63,22 +63,24 @@ may be either
 or 0 (representing the join field).
 Elements in
 .Ar list
-may be separated by blanks or commas. For example,
+may be separated by blanks or commas.
+For example,
 .Bd -literal -offset indent
 join -o "0 2.1 1.3"
 .Ed
 .Pp
 would print the join field, the first field of
-.Ar file2 Ns ,
+.Ar file2 ,
 then the third field of
-.Ar file1 Ns .
+.Ar file1 .
 .Pp
 Only paired lines are formatted with the
 .Fl o
-option. Unpairable lines (selected with
+option.
+Unpairable lines (selected with
 .Fl a
 or
-.Fl v Ns )
+.Fl v )
 are printed raw.
 .It Fl t Ar delim
 Use the arbitrary string
@@ -98,7 +100,7 @@ specification with the following exeption:
 .Bl -bullet -offset indent
 .It
 Unpairable lines ignore formatting specified with
-.Fl o Ns .
+.Fl o .
 .El
 .Pp
 The possibility of specifying multibyte delimiters of arbitrary

logger.1

@@ -31,7 +31,8 @@ Set the message
 .Ar priority
 given symbolically as a
 .Dq facility.level
-pair. The default is
+pair.
+The default is
 .Dq user.notice .
 .It Fl s
 Also log to stderr.

ls.1

@@ -18,8 +18,8 @@
 .Op Ar file ...
 .Sh DESCRIPTION
 .Nm
-lists each given file, and the contents of each given directory. If no files
+lists each given file, and the contents of each given directory.
-are given the current directory is listed.
+If no files are given the current directory is listed.
 .Sh OPTIONS
 .Bl -tag -width Ds
 .It Fl A
@@ -67,7 +67,8 @@ Append a file type indicator to directories.
 .It Fl q
 Replace non-printable characters in filenames with '?'.
 .It Fl R
-List directory content recursively.  The
+List directory content recursively.
+The
 .Fl 1
 flag is set implicitly.
 .It Fl r

mkdir.1

@@ -19,7 +19,8 @@ if it does not already exist.
 .It Fl m
 Set the file
 .Ar mode
-of newly created directories. See
+of newly created directories.
+See
 .Xr chmod 1 .
 .It Fl p
 Also create necessary parent directories and

mkfifo.1

@@ -18,7 +18,8 @@ if it does not already exist.
 .It Fl m
 Set the file
 .Ar mode
-of newly created named pipes. See
+of newly created named pipes.
+See
 .Xr chmod 1 .
 .El
 .Sh SEE ALSO

mktemp.1

@@ -13,7 +13,8 @@
 .Nm
 creates a temporary file by generating a unique filename with
 .Ar template ,
-which has to have at least six 'X's appended to it.  If no
+which has to have at least six 'X's appended to it.
+If no
 .Ar template
 is specified, a default of 'tmp.XXXXXXXXXX' is used and the
 tmpdir set to '/tmp' or, if set, the TMPDIR environment variable.
@@ -24,10 +25,11 @@ Create a temporary directory instead of a file.
 .It Fl p Ar directory
 Use the specified
 .Ar directory
-as a prefix when generating the temporary filename. The directory will be
+as a prefix when generating the temporary filename.
-overridden by the user's
+The directory will be overridden by the user's
 .Ev TMPDIR
-environment variable if it is set. This option implies the
+environment variable if it is set.
+This option implies the
 .Fl t
 flag (see below).
 .It Fl q
@@ -37,9 +39,11 @@ Generate a path rooted in a temporary directory.
 .It Fl u
 Unlink file before
 .Nm
-exits. This is slightly better than
+exits.
+This is slightly better than
 .Xr mktemp 3
-but still introduces a race condition. Use of this option is not encouraged.
+but still introduces a race condition.
+Use of this option is not encouraged.
 .El
 .Sh SEE ALSO
 .Xr mkdtemp 3 ,

nl.1

@@ -40,7 +40,8 @@ All lines.
 .It n
 No lines.
 .It t
-Only non-empty lines. This is the default.
+Only non-empty lines.
+This is the default.
 .It p Ns Ar expr
 Only lines matching
 .Ar expr
@@ -50,11 +51,13 @@ according to
 .It Fl d Ar delim
 Set
 .Ar delim
-as the delimiter for logical pages. If
+as the delimiter for logical pages.
+If
 .Ar delim
 is only one character,
 .Nm
-appends ":" to it. The default is "\e:".
+appends ":" to it.
+The default is "\e:".
 .It Fl i Ar num
 Set the increment between numbered lines to
 .Ar num .
@@ -70,14 +73,16 @@ to one of:
 .It ln
 Left justified.
 .It rn
-Right justified. This is the default.
+Right justified.
+This is the default.
 .It rz
 Right justified with leading zeroes.
 .El
 .It Fl s Ar sep
 Use
 .Ar sep
-to separate line numbers and lines. The default is "\et".
+to separate line numbers and lines.
+The default is "\et".
 .It Fl v Ar num
 Start counting lines from
 .Ar num .

od.1

@@ -16,7 +16,8 @@
 .Nm
 writes an octal dump of each
 .Ar file
-to stdout.  If no
+to stdout.
+If no
 .Ar file
 is given
 .Nm
@@ -27,7 +28,8 @@ reads from stdin.
 .Ar addressformat
 is one of d|o|x|n and sets the address to be
 either in \fId\fRecimal, \fIo\fRctal, he\fIx\fRadecimal or \fIn\fRot
-printed at all.  The default is octal.
+printed at all.
+The default is octal.
 .It Fl E | e
 Force Little Endian
 .Fl ( e )
@@ -59,7 +61,8 @@ he\fIx\fRadecimal format, processing the given amount of bytes or the length
 of \fIC\fRhar, \fIS\fRhort, \fII\fRnteger or \fIL\fRong.
 The default is octal with 4 bytes.
 .It Fl v
-Always set. Write all input data, including duplicate lines.
+Always set.
+Write all input data, including duplicate lines.
 .It Fl x
 Equivalent to
 .Fl t x2 .

printenv.1

@@ -11,7 +11,8 @@
 .Nm
 prints the entire environment as key=value pairs if no
 .Ar var
-is given. Otherwise,
+is given.
+Otherwise,
 .Nm
 prints only the value of each
 .Ar var

pwd.1

@@ -13,7 +13,8 @@ prints the path of the current working directory.
 .Sh OPTIONS
 .Bl -tag -width Ds
 .It Fl L
-Logical path, uses $PWD. This is the default.
+Logical path, uses $PWD.
+This is the default.
 .It Fl P
 Physical path, avoids all symlinks.
 .El

rev.1

@@ -11,9 +11,9 @@
 .Nm
 reads each
 .Ar file
-in sequence and writes it to stdout, but
+in sequence and writes it to stdout, but with all characters in each
-with all characters in each line in reverse
+line in reverse order.
-order. If no
+If no
 .Ar file
 is given
 .Nm

sed.1

@@ -56,46 +56,57 @@ Editing commands take the form
 .Ss Addresses
 Addresses are either blank, a positive decimal integer denoting a line
 number, the character '$' denoting the last line of input, or a regular
-expression. A command with no addresses matches every line, one address
+expression.
-matches individual lines, and two addresses matches a range of lines
+A command with no addresses matches every line, one address matches
-from the first to the second address inclusive.
+individual lines, and two addresses matches a range of lines from the
+first to the second address inclusive.
 .Ss Functions
 .Bl -tag -width Ds
 .It Ar a Op Ar text
 Append text to output after end of current cycle.
 .It Ar b Op Ar label
-Branch to label. If no label is provided branch to end of script.
+Branch to label.
+If no label is provided branch to end of script.
 .It Ar c Op Ar text
-Change. Delete addressed range and output text after end of current cycle.
+Change.
+Delete addressed range and output text after end of current cycle.
 .It Ar d
 Delete pattern space and begin next cycle.
 .It Ar D
 Delete pattern space up to and including first newline and begin new
-cycle without reading input. If there is no newline, behave like d.
+cycle without reading input.
+If there is no newline, behave like d.
 .It Ar g
-Get. Replace the pattern space with the hold space.
+Get.
+Replace the pattern space with the hold space.
 .It Ar G
-Get. Append a newline and the hold space to the pattern space.
+Get.
+Append a newline and the hold space to the pattern space.
 .It Ar h
-Hold. Replace the hold space with the pattern space.
+Hold.
+Replace the hold space with the pattern space.
 .It Ar H
-Hold. Append a newline and the pattern space to the hold space.
+Hold.
+Append a newline and the pattern space to the hold space.
 .It Ar i Op Ar text
 Insert text in output.
 .It Ar l
 List? Write the pattern space replacing known non printing characters with
-backslash escaped versions (\\\\, \\a, \\b, \\f, \\r, \\t, \\v). Print
+backslash escaped versions (\\\\, \\a, \\b, \\f, \\r, \\t, \\v).
-bad UTF-8 sequences as \\ooo where ooo is a three digit octal number. Mark
+Print bad UTF-8 sequences as \\ooo where ooo is a three digit octal
-end of lines with '$'.
+number.
+Mark end of lines with '$'.
 .It Ar n
-Next. Write pattern space (unless
+Next.
+Write pattern space (unless
 .Fl n ) ,
-read next line into pattern space, and continue current cycle. If there
+read next line into pattern space, and continue current cycle.
-is no next line, quit.
+If there is no next line, quit.
 .It Ar N
-Next. Read next line, append newline and next line to pattern space,
+Next.
-and continue cycle. If there is no next line, quit without printing
+Read next line, append newline and next line to pattern space, and
-current pattern space.
+continue cycle.
+If there is no next line, quit without printing current pattern space.
 .It Ar p
 Print current pattern space.
 .It Ar P
@@ -105,12 +116,14 @@ Quit.
 .It Ar r file
 Read file and write contents to output.
 .It Ar s/re/text/flags
-Find occurences of regular expression re in the pattern space and replace
+Find occurences of regular expression re in the pattern space and
-with text. A '&' in text is replaced with the entire match. A \\d where
+replace with text.
-d is a decimal digit 1-9 is replaced with the corresponding match group
+A '&' in text is replaced with the entire match.
-from the regular expression. \\n represents a newline in both the regular
+A \\d where d is a decimal digit 1-9 is replaced with the corresponding
-expression and replacement text. A literal newline in the replacement
+match group from the regular expression.
-text must be preceded by a \\.
+\\n represents a newline in both the regular expression and replacement
+text.
+A literal newline in the replacement text must be preceded by a \\.
 .Pp
 Flags are
 .Bl -tag -width Ds
@@ -118,16 +131,18 @@ Flags are
 A positive decimal number denoting which match in the pattern space
 to replace.
 .It Ar g
-Global. Replace all matches in the pattern space.
+Global.
+Replace all matches in the pattern space.
 .It Ar p
 Print the pattern if a replacement was made.
 .It Ar w file
 Write the pattern space to file if a replacement was made.
 .El
 .It Ar t Op Ar label
-Test. Branch to corresponding labelif a substitution has been made since
+Test.
-the last line was read or last t command was executed. If no label is
+Branch to corresponding label if a substitution has been made since the
-provided branch to end of script.
+last line was read or last t command was executed.
+If no label is provided branch to end of script.
 .It Ar w file
 Write pattern space to file.
 .It Ar x

seq.1

@@ -31,7 +31,8 @@ as the output line format according to
 .It Fl s Ar sep
 Print
 .Ar sep
-between output lines. The default is "\en".
+between output lines.
+The default is "\en".
 .It Fl w
 Print out lines in equal width.
 .El

sort.1

@@ -26,8 +26,9 @@ reads from stdin.
 .It Fl C
 Check that the concatenation of the given
 .Ar files
-is sorted rather than sorting them. In this mode, no output is printed to
+is sorted rather than sorting them.
-stdout, and the exit status indicates the result of the check.
+In this mode, no output is printed to stdout, and the exit status
+indicates the result of the check.
 .It Fl b
 Skip leading whitespace of columns when sorting.
 .It Fl c
@@ -62,7 +63,8 @@ where
 and
 .Sy e
 are the starting column, starting character in that column, ending column and
-the ending character of that column respectively. If they are not specified,
+the ending character of that column respectively.
+If they are not specified,
 .Sy s
 refers to the first character of the specified starting column,
 .Sy E

strings.1

@@ -25,11 +25,13 @@ reads from stdin.
 .It Fl a
 Scan each
 .Ar file
-entirely. This is the default.
+entirely.
+This is the default.
 .It Fl n Ar num
 Print sequences of at least
 .Ar num
-characters.  The default is 4.
+characters.
+The default is 4.
 .It Fl t Ar format
 Prepend each string with its byte offset, with
 .Ar format

sync.1

@@ -10,8 +10,8 @@
 .Nm
 invokes
 .Xr sync 2
-to flush all unwritten changes to disk. This is
+to flush all unwritten changes to disk.
-usually done before shutting down, rebooting or halting.
+This is usually done before shutting down, rebooting or halting.
 .Sh SEE ALSO
 .Xr fsync 2 ,
 .Xr sync 2

tail.1

@@ -13,7 +13,8 @@
 .Nm
 writes the last 10 lines of each
 .Ar file
-to stdout. If no
+to stdout.
+If no
 .Ar file
 is given,
 .Nm
@@ -23,15 +24,16 @@ reads from stdin.
 .It Fl c Ar num | Fl m Ar num | Fl n Ar num | Fl Ns Ar num
 Display final
 .Ar num
-bytes | characters | lines |
+bytes | characters | lines | lines.
-lines. If
+If
 .Ar num
 begins with '+'
 it is an offset from the beginning of each
 .Ar file .
 If
 .Ar num
-begins with '-' it is as if no sign was given. The default is 10 lines.
+begins with '-' it is as if no sign was given.
+The default is 10 lines.
 .It Fl f
 If one
 .Ar file

tar.1

@@ -32,8 +32,8 @@ before beginning.
 .It Fl f Ar file
 Set
 .Ar file
-as input | output archive instead of stdin | stdout. If '-',
+as input | output archive instead of stdin | stdout.
-stdin | stdout is used.
+If '-', stdin | stdout is used.
 .It Fl m
 Do not preserve modification time.
 .It Fl t
@@ -43,8 +43,8 @@ Extract archive.
 .It Fl h
 Always dereference symbolic links while recursively traversing directories.
 .It Fl J | Fl Z | Fl a | Fl j | Fl z
-Use xz | compress | lzma | bzip2 | gzip compression or decompression. These
+Use xz | compress | lzma | bzip2 | gzip compression or decompression.
-utilities must be installed separately.
+These utilities must be installed separately.
 Using these flags is discouraged in favour of the flexibility
 and clarity of pipes:
 .Bd -literal -offset indent

tftp.1

@@ -13,17 +13,20 @@
 .Sh DESCRIPTION
 .Nm
 is a client that implements the trivial file transfer protocol over
-either IPv4 or IPv6 as specified in RFC 1350.  It can be used to transfer
+either IPv4 or IPv6 as specified in RFC 1350.
-files to and from remote machines.
+It can be used to transfer files to and from remote machines.
 .Sh OPTIONS
 .Bl -tag -width Ds
 .It Fl h Ar host
 Set the remote hostname.
 .It Fl p Ar port
-Set the remote port.  It defaults to port 69.
+Set the remote port.
+It defaults to port 69.
 .It Fl x
-Extract a file from the server.  This is the default
+Extract a file from the server.
-if no flags are specified.  Output goes to stdout.
+This is the default if no flags are specified.
+Output goes to stdout.
 .It Fl c
-Create a file on the server.  Input comes from stdin.
+Create a file on the server.
+Input comes from stdin.
 .El

touch.1

@@ -13,7 +13,8 @@
 .Nm
 sets the access and modification time of each
 .Ar file
-to the current time of day. If
+to the current time of day.
+If
 .Ar file
 doesn't exist, it is created with default permissions.
 .Sh OPTIONS

tsort.1

@@ -9,12 +9,13 @@
 .Op Ar file
 .Sh DESCRIPTION
 .Nm
-topologically sorts a graph. The graph is read
+topologically sorts a graph.
-either from
+The graph is read either from
 .Ar file
-or from standard input. The result is not optimized
+or from standard input.
-for any particular usage. Loops are detected and
+The result is not optimized for any particular usage.
-reported to standard error, but does not stop the sort.
+Loops are detected and reported to standard error, but does not stop the
+sort.
 .Pp
 The input is a list of edges (vertex pairs), where
 the edge is directed from the first vertex to the

uname.1

@@ -9,7 +9,8 @@
 .Op Fl amnrsv
 .Sh DESCRIPTION
 .Nm
-writes system information to stdout. If no flags are given,
+writes system information to stdout.
+If no flags are given,
 .Nm
 implies
 .Fl s .

uniq.1

@@ -18,11 +18,13 @@ reads the
 file and writes one copy of a line from each group of consecutive
 duplicate lines to the
 .Ar output
-file. If no
+file.
+If no
 .Ar input
 file is given
 .Nm
-reads from stdin. If no
+reads from stdin.
+If no
 .Ar output
 file is given
 .Nm

uudecode.1

@@ -14,9 +14,10 @@
 reads
 .Ar file
 and writes a decoded version to the file specified in the uuencoded header.
-In case the file already exists, it is truncated. Otherwise a new file is
+In case the file already exists, it is truncated.
-created. The permissions of the created/accessed file are changed to
+Otherwise a new file is created.
-reflect the mode in the header.
+The permissions of the created/accessed file are changed to reflect the
+mode in the header.
 If no
 .Ar file
 is given

xargs.1

@@ -21,15 +21,16 @@ with the strings as
 .Pp
 Any arguments specified on the command line are given to the command upon
 each invocation, followed by some number of the arguments read from
-stdin. The command is repeatedly executed one or more times until stdin
+stdin.
-is exhausted.
+The command is repeatedly executed one or more times until stdin is exhausted.
 .Pp
 Spaces, tabs and newlines may be embedded in arguments using single (`'')
-or double (`"') quotes or backslashes ('\\'). Single quotes escape all
+or double (`"') quotes or backslashes ('\\').
-non-single quote characters, excluding newlines, up to the matching single
+Single quotes escape all non-single quote characters, excluding newlines, up
-quote. Double quotes escape all non-double quote characters, excluding
+to the matching single quote.
-newlines, up to the matching double quote. Any single character, including
+Double quotes escape all non-double quote characters, excluding newlines, up
-newlines, may be escaped by a backslash.
+to the matching double quote.
+Any single character, including newlines, may be escaped by a backslash.
 .Sh OPTIONS
 .Bl -tag -width Ds
 .It Fl n Ar num
@@ -37,8 +38,8 @@ Use at most
 .Ar num
 arguments per command line.
 .It Fl r
-Do not run the command if there are no arguments. Normally the command is
+Do not run the command if there are no arguments.
-executed at least once even if there are no arguments.
+Normally the command is executed at least once even if there are no arguments.
 .It Fl E Ar eofstr
 Use
 .Ar eofstr

xinstall.1

@@ -1,4 +1,4 @@
-.Dd 2016-24-27
+.Dd 2016-12-03
 .Dt INSTALL 1
 .Os sbase
 .Sh NAME
@@ -31,7 +31,8 @@ If more than one
 .Ar source
 is given
 .Ar dest
-is treated as a directory. Otherwise
+is treated as a directory.
+Otherwise
 .Ar dest
 is treated as a filename.
 .Nm
@@ -52,12 +53,13 @@ Change the installed files' group to
 .Ar group .
 This may be a group name or a group identifier.
 .It Fl m Ar mode
-Change the file modes. Both numerical and symbolic
+Change the file modes.
-values are supported. See
+Both numerical and symbolic values are supported.
+See
 .Xr chmod 1
 for the syntex.
-Default mode 0755. If a file has the mode 0644 and
+Default mode 0755.
-is copied with
+If a file has the mode 0644 and is copied with
 .It Fl o Ar owner
 Change the installed files' owner to
 .Ar owner .
@@ -68,8 +70,8 @@ Copy files into the directory
 .Nm install ,
 the copy's mode will be 0755 unless
 .Fl m
-is used to select another mode. When the symbolic
+is used to select another mode.
-notation is used, the base mode is 0000.
+When the symbolic notation is used, the base mode is 0000.
 .El
 .Sh SEE ALSO
 .Xr chmod 1 ,
@@ -79,6 +81,6 @@ notation is used, the base mode is 0000.
 .Sh STANDARDS
 The
 .Nm
-utility is not standardized. This implementation is a subset
+utility is not standardized.
-of the GNU implementation and a subset with extensions to
+This implementation is a subset of the GNU implementation and a subset
-the FreeBSD implementation.
+with extensions to the FreeBSD implementation.