FYI: correct typo in su --help: s/--commmand/--command/

[Jim Meyering]

I've just done this:

        * src/su.c (usage): Correct typo in --help output: s/commmand/command/
        Reported by Tim Waugh.
        Also remove the comment duplicating much of --help output.

Index: src/su.c
===================================================================
RCS file: /fetish/cu/src/su.c,v
retrieving revision 1.90
retrieving revision 1.91
diff -u -p -u -r1.90 -r1.91
--- src/su.c    26 Mar 2006 12:08:20 -0000      1.90
+++ src/su.c    21 Jul 2006 13:32:41 -0000      1.91
@@ -38,28 +38,6 @@
    restricts who can su to UID 0 accounts.  RMS considers that to
    be fascist.
 
-   Options:
-   -, -l, --login      Make the subshell a login shell.
-                       Unset all environment variables except
-                       TERM, HOME and SHELL (set as above), and USER
-                       and LOGNAME (set unconditionally as above), and
-                       set PATH to a default value.
-                       Change to USER's home directory.
-                       Prepend "-" to the shell's name.
-   -c, --commmand=COMMAND
-                       Pass COMMAND to the subshell with a -c option
-                       instead of starting an interactive shell.
-   -f, --fast          Pass the -f option to the subshell.
-   -m, -p, --preserve-environment
-                       Do not change HOME, USER, LOGNAME, SHELL.
-                       Run $SHELL instead of USER's shell from /etc/passwd
-                       unless not the superuser and USER's shell is
-                       restricted.
-                       Overridden by --login and --shell.
-   -s, --shell=shell   Run SHELL instead of USER's shell from /etc/passwd
-                       unless not the superuser and USER's shell is
-                       restricted.
-
    Compile-time options:
    -DSYSLOG_SUCCESS    Log successful su's (by default, to root) with syslog.
    -DSYSLOG_FAILURE    Log failed su's (by default, to root) with syslog.
@@ -410,7 +388,7 @@ usage (int status)
 Change the effective user id and group id to that of USER.\n\
 \n\
   -, -l, --login               make the shell a login shell\n\
-  -c, --commmand=COMMAND       pass a single COMMAND to the shell with -c\n\
+  -c, --command=COMMAND        pass a single COMMAND to the shell with -c\n\
   -f, --fast                   pass -f to the shell (for csh or tcsh)\n\
   -m, --preserve-environment   do not reset environment variables\n\
   -p                           same as -m\n\