Remove contractions.

usr.bin/calendar/calendar.1

@@ -313,7 +313,7 @@ the time-difference towards Greenwich.
 The new and full moons are happening on the day indicated: They
 might happen in the time period in the early night or in the late
 evening.
-It doesn't indicate that they are starting in the night on that date.
+It does not indicate that they are starting in the night on that date.
 .Pp
 Because of minor differences between the output of the formulas
 used and other sources on the Internet, Druids and Werewolves should

usr.bin/m4/lib/ohash_init.3

@@ -166,7 +166,7 @@ for (n = ohash_first(h, &i); n != NULL; n = ohash_next(h, &i))
 points to an auxiliary unsigned integer used to record the current position
 in the ohash table.
 Those functions are safe to use even while entries are added to/removed
-from the table, but in such a case they don't guarantee that new entries
+from the table, but in such a case they do not guarantee that new entries
 will be returned.
 As a special case, they can safely be used to free elements in the table.
 .Pp

usr.bin/m4/m4.1

@@ -97,7 +97,7 @@ You can change the quote characters with the
 .Ic changequote
 built-in macro.
 .Pp
-Most built-ins don't make any sense without arguments, and hence are not
+Most built-ins do not make any sense without arguments, and hence are not
 recognized as special when not followed by an open parenthesis.
 .Pp
 The options are as follows:

usr.bin/script/script.1

@@ -75,7 +75,7 @@ retaining the prior contents.
 .It Fl d
 When playing back a session with the
 .Fl p
-flag, don't sleep between records when playing back a timestamped session.
+flag, do not sleep between records when playing back a timestamped session.
 .It Fl k
 Log keys sent to the program as well as output.
 .It Fl p

usr.bin/unzip/unzip.1

@@ -50,7 +50,7 @@ Extract to stdout/screen.
 When extracting files from the zipfile, they are written to stdout.
 This is similar to
 .Fl p ,
-but doesn't suppress normal output.
+but does not suppress normal output.
 .It Fl d Ar dir
 Extract files into the specified directory rather than the current
 directory.

usr.bin/who/who.1

@@ -51,7 +51,7 @@ The options are as follows:
 .It Fl a
 Equivalent to
 .Fl bTu ,
-with the exception that output isn't restricted to the time and date of
+with the exception that output is not restricted to the time and date of
 the last system reboot.
 .It Fl b
 Write the time and date of the last system reboot.