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-as.pod b/llvm/docs/CommandGuide/llvm-as.pod
index 045a924..185c009 100644
--- a/llvm/docs/CommandGuide/llvm-as.pod
+++ b/llvm/docs/CommandGuide/llvm-as.pod
@@ -50,7 +50,7 @@
 write raw bitcode output if the output stream is a terminal. With this option,
 B<llvm-as> will write raw bitcode regardless of the output device.
 
-=item B<--help>
+=item B<-help>
 
 Print a summary of command line options.