Refer to -help instead of --help since this is what tools themselves say.
Also, have tools output -help-hidden rather than refer to --help-hidden,
for consistency, and likewise adjust documentation.  This doesn't change
every mention of --help, only those which seemed clearly safe.

llvm-svn: 96578
diff --git a/llvm/docs/CommandGuide/llvm-link.pod b/llvm/docs/CommandGuide/llvm-link.pod
index e1a1267..8d06cc9 100644
--- a/llvm/docs/CommandGuide/llvm-link.pod
+++ b/llvm/docs/CommandGuide/llvm-link.pod
@@ -51,7 +51,7 @@
 If specified, B<llvm-link> prints a human-readable version of the output
 bitcode file to standard error.
 
-=item B<--help>
+=item B<-help>
 
 Print a summary of command line options.