Corrections to the standalone tool

lark/tools/standalone.py

@@ -3,6 +3,8 @@
 #
 #   Lark Stand-alone Generator Tool
 # ----------------------------------
+# Generates a stand-alone LALR(1) parser with a standard lexer
+#
 # Git:    https://github.com/erezsh/lark
 # Author: Erez Shinan (erezshin@gmail.com)
 #
@@ -158,8 +160,7 @@ def main(fn):
     parser_atoms = ParserAtoms(lark_inst.parser.parser)
     tree_builder_atoms = TreeBuilderAtoms(lark_inst)
 
-    print('# Generated by Lark v%s' % lark.__version__)
-
+    print('# The file was automatically generated by Lark v%s' % lark.__version__)
 
     for pyfile in EXTRACT_STANDALONE_FILES:
         print (extract_sections(open(os.path.join(__larkdir__, pyfile)))['standalone'])
@@ -171,12 +172,10 @@ def main(fn):
     tree_builder_atoms.print_python()
     parser_atoms.print_python()
 
-    # print('print(parser.parse(lex("1+2")).pretty())')
-
 if __name__ == '__main__':
     if len(sys.argv) < 2:
-        print("Generates a stand-alone lalr parser")
-        print("Usage: %s <grammar_path>" % sys.argv[0])
+        print("Lark Stand-alone Generator Tool")
+        print("Usage: python -m lark.tools.standalone <grammar-file>")
         sys.exit(1)
 
     fn ,= sys.argv[1:]