Improve shell documentation:

* Consistently misspell built-in as builtin.

* Add a builtin(1) manpage and create builtin(1) MLINKS for all shell
  builtin commands for which no standalone utility exists.  These MLINKS
  replace those that were created for csh(1).

* Add appropriate xrefs for builtin(1) to the csh(1) and sh(1) manpages,
  as well as to the manpages of standalone utilities which are supported
  as shell builtin commands in at least one of the shells. In such
  manpages, explain that similar functionality may be provided as a
  shell builtin command.

* Improve sh(1)'s description of the cd builtin command. Csh(1) already
  describes it adequately. Replace the cd(1) manpage with a builtin(1)
  MLINKS link.

* Clean up some mdoc problems: use Xr instead of literal "foo(n)"; use
  Ic instead of Xr for shell builtin commands.

* Undo English contractions.

Reviewed by:	mpp, rgrimes

1 files changed, 7 insertions, 8 deletions

diff --git a/usr.bin/time/time.1 b/usr.bin/time/time.1
index 4d29566..196042c 100644
--- a/usr.bin/time/time.1
+++ b/usr.bin/time/time.1
@@ -90,14 +90,12 @@ Makes
 output POSIX.2 compliant (each time is printed on its own line).
 .El
 .Pp
-Most shells (including
-.Xr csh 1 )
-have their own and syntactically different builtin version of
-.Nm time .
-The command described here
-is available as
-.Pa /usr/bin/time
-to users of those shells.
+Some shells may provide a builtin
+.Nm
+command which is similar or identical to this utility.  Consult
+the
+.Xr builtin 1
+manual page. 
 .Sh DIAGNOSTICS
 If
 .Ar command
@@ -115,6 +113,7 @@ If
 encounters any other error, the exit status is between 1 and 125
 included.
 .Sh SEE ALSO
+.Xr builtin 1 ,
 .Xr csh 1 ,
 .Xr getrusage 2 ,
 .Xr wait 2