War on whitespace

This uses "git-apply --whitespace=strip" to fix whitespace errors that have
crept in to our source files over time.  There are a few files that need
to have trailing whitespaces (most notably, test vectors).  The results
still passes the test, and build result in Documentation/ area is unchanged.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

patch-id.c

@@ -81,4 +81,4 @@ int main(int argc, char **argv)
 
 	generate_id_list();
 	return 0;
-}	
+}