parsergen: improve usage message

Now usage message is slightly better.

Signed-off-by: NeilBrown <neil@brown.name>

diff --git a/csrc/parsergen.mdc b/csrc/parsergen.mdc
index ad20195f51b8f355bc0bca3eebe021eb495106e0..815605c3f6a9c19f2ed5d47096ad9bb5ab2c3bce 100644 (file)
--- a/csrc/parsergen.mdc
+++ b/csrc/parsergen.mdc
@@ -2446,7 +2446,7 @@ grammar file).
                case 't':
                        tag = optarg; break;
                default:
-                       fprintf(stderr, "Usage: parsergen ...\n");
+                       fprintf(stderr, "Usage: parsergen -[05SL1R] [-t tag] [-o output] input\n");
                        exit(1);
                }
        }