Tweak usage strings

buildroot/share/git/mfinfo

@@ -12,7 +12,7 @@
 #   - Current Branch
 #
 
-# usage() { echo "Usage: `basename $0` [1|2] [branch]" 1>&2 ; }
+# usage() { echo "usage: `basename $0` [1|2] [branch]" 1>&2 ; }
 # [[ $# < 3 && $1 != "-h" && $1 != "--help" ]] || { usage; exit 1; }
 
 CURR=$(git branch 2>/dev/null | grep ^* | sed 's/\* //g')