doc: add "..." to Usage, to indicate there may be multiple OPTIONs

* src/base64.c (usage): Likewise.
* src/cat.c (usage): Likewise.
* src/md5sum.c (usage): Likewise.
* src/mkdir.c (usage): Likewise.
* src/mkfifo.c (usage): Likewise.
* src/split.c (usage): Likewise.
* src/stat.c (usage): Likewise.
Heiko Marr reported the problem with mkdir.

THANKS

@@ -213,6 +213,7 @@ Harald Dunkel                       harald.dunkel@t-online.de
 Harry Liu                           rliu@lek.ugcs.caltech.edu
 Harti Brandt                        brandt@fokus.fraunhofer.de
 Harvey Eneman                       Harvey.Eneman@oracle.com
+Heiko Marr                          h.marr@webmasters.de
 Helen Faulkner                      helen_ml_faulkner@yahoo.co.uk
 Herbert Xu                          herbert@gondor.apana.org.au
 Holger Berger                       hberger@ess.nec.de

src/base64.c

@@ -57,7 +57,7 @@ usage (int status)
   else
     {
       printf (_("\
-Usage: %s [OPTION] [FILE]\n\
+Usage: %s [OPTION]... [FILE]\n\
 Base64 encode or decode FILE, or standard input, to standard output.\n\
 \n"), program_name);
       fputs (_("\

src/cat.c

@@ -90,7 +90,7 @@ usage (int status)
   else
     {
       printf (_("\
-Usage: %s [OPTION] [FILE]...\n\
+Usage: %s [OPTION]... [FILE]...\n\
 "),
 	      program_name);
       fputs (_("\

src/md5sum.c

@@ -150,7 +150,7 @@ usage (int status)
   else
     {
       printf (_("\
-Usage: %s [OPTION] [FILE]...\n\
+Usage: %s [OPTION]... [FILE]...\n\
 Print or check %s (%d-bit) checksums.\n\
 With no FILE, or when FILE is -, read standard input.\n\
 \n\

src/mkdir.c

@@ -55,7 +55,7 @@ usage (int status)
 	     program_name);
   else
     {
-      printf (_("Usage: %s [OPTION] DIRECTORY...\n"), program_name);
+      printf (_("Usage: %s [OPTION]... DIRECTORY...\n"), program_name);
       fputs (_("\
 Create the DIRECTORY(ies), if they do not already exist.\n\
 \n\

src/mkfifo.c

@@ -49,7 +49,7 @@ usage (int status)
 	     program_name);
   else
     {
-      printf (_("Usage: %s [OPTION] NAME...\n"), program_name);
+      printf (_("Usage: %s [OPTION]... NAME...\n"), program_name);
       fputs (_("\
 Create named pipes (FIFOs) with the given NAMEs.\n\
 \n\

src/split.c

@@ -100,7 +100,7 @@ usage (int status)
   else
     {
       printf (_("\
-Usage: %s [OPTION] [INPUT [PREFIX]]\n\
+Usage: %s [OPTION]... [INPUT [PREFIX]]\n\
 "),
 	      program_name);
     fputs (_("\

src/stat.c

@@ -908,7 +908,7 @@ usage (int status)
 	     program_name);
   else
     {
-      printf (_("Usage: %s [OPTION] FILE...\n"), program_name);
+      printf (_("Usage: %s [OPTION]... FILE...\n"), program_name);
       fputs (_("\
 Display file or file system status.\n\
 \n\