fix problem with printf

patches/utils/patch_header.sh

@@ -28,13 +28,13 @@ CMD_OPTIONS="options:\n\n-h, --help\n\tShow brief help.\n-l LOGIN_PATH, --login-
 set -e
 
 function _print_help() {
-  printf "$USAGE"
-  printf "$CMD_OPTIONS"
+  printf -- "$USAGE"
+  printf -- "$CMD_OPTIONS"
   if [ -n "$PRINT_HELP" ]; then
     printf -- "$PRINT_HELP"
   fi
   if [ -n "$1" ]; then
-    printf "$1"
+    printf -- "$1"
   fi
 }
 while test $# -gt 0; do