Update code to support non-html genattrib output file

Author: chinyeungli

about_code_tool/genattrib.py

@@ -200,15 +200,17 @@ def main(parser, options, args):
         input_path = extract_zip(input_path)
 
     if isdir(output_path):
-        print('ERROR: <output_path> must be an HTML file, not a directory')
+        print('ERROR: <output_path> cannot be a directory')
         parser.print_help()
         sys.exit(errno.EISDIR)
 
+    """
     # We only support HTML currently
     if not output_path.endswith('.html'):
         print('ERROR: <output_path> must be an HTML file.')
         parser.print_help()
         sys.exit(errno.EINVAL)
+    """
 
     if exists(output_path) and not overwrite:
         print('ERROR: A file at <output_path> already exists. Select a different file name or use the --overwrite option.')