typos from wiz@netbsd (including one from a PR from Quentin Garnier);

slight sync with NetBSD page;
ok millert@

src/lib/libc/stdlib/getopt.3

@@ -25,7 +25,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: getopt.3,v 1.26 2003/09/02 18:24:21 jmc Exp $
+.\"	$OpenBSD: getopt.3,v 1.27 2003/09/18 09:29:27 jmc Exp $
 .\"
 .Dd December 17, 2002
 .Dt GETOPT 3
@@ -47,9 +47,11 @@ The
 .Fn getopt
 function incrementally parses a command line argument list
 .Fa argv
-and returns the next known option character.
+and returns the next
+.Em known
+option character.
 An option character is
-.Dq known
+.Em known
 if it has been specified in the string of accepted option characters,
 .Fa optstring .
 .Pp
@@ -113,7 +115,7 @@ by the option
 .Ql --
 (double dash) which causes
 .Fn getopt
-to signal the end of argument processing and returns \-1.
+to signal the end of argument processing and return \-1.
 When all options have been processed (i.e., up to the first non-option
 argument),
 .Fn getopt
@@ -134,9 +136,9 @@ it returns
 If
 .Fa optstring
 has a leading
-.Sq \:
+.Sq \&:
 then a missing option argument causes
-.Sq \:
+.Sq \&:
 to be returned instead of
 .Sq \&? .
 In either case, the variable
@@ -147,6 +149,8 @@ The
 function returns \-1 when the argument list is exhausted.
 .Sh EXAMPLES
 .Bd -literal -compact
+extern char *optarg;
+extern int optind;
 int bflag, ch, fd;
 
 bflag = 0;
@@ -174,7 +178,7 @@ argv += optind;
 If the
 .Fn getopt
 function encounters a character not found in the string
-.Va optstring
+.Fa optstring
 or detects
 a missing option argument it writes an error message to
 .Em stderr
@@ -184,7 +188,7 @@ Setting
 .Va opterr
 to a zero will disable these error messages.
 If
-.Va optstring
+.Fa optstring
 has a leading
 .Ql \&:
 then a missing option argument causes a
@@ -198,7 +202,7 @@ this is reasonable but reduces the amount of error checking possible.
 .Xr getopt 1 ,
 .Xr getopt_long 3 ,
 .Xr getsubopt 3
-.Sh EXTENSIONS
+.Sh STANDARDS
 The
 .Va optreset
 variable was added to make it possible to call the
@@ -223,7 +227,7 @@ This was changed by
 to decouple
 .Fn getopt
 from
-.Pa <stdio.h> .
+.Aq Pa stdio.h .
 .Pp
 A single dash
 .Pq Ql -