(usage): Include one- or two-line synopsis in --help output.

From Karl Berry.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/cat.c b/src/cat.c
index 764778f85..8c250fc1e 100644
--- a/src/cat.c
+++ b/src/cat.c
@@ -91,6 +91,7 @@ Usage: %s [OPTION] [FILE]...\n\
 ",
 	      program_name);
       printf ("\
+Concatenate FILE(s), or standard input, to standard output.\n\
 \n\
   -b, --number-nonblank    number nonblank output lines\n\
   -e                       equivalent to -vE\n\