redpen: fix start column

test/handler/test_redpen_handler.vader

@@ -9,7 +9,7 @@ Execute(redpen handler should handle errors output):
   \ [
   \   {
   \     'lnum': 1,
-  \     'col': 9,
+  \     'col': 10,
   \     'end_lnum': 1,
   \     'end_col': 15,
   \     'text': 'Found possibly misspelled word "plugin". (Spelling)',