Addressing comments

codespell_lib/_codespell.py

@@ -671,7 +671,7 @@ def main(*args):
     try:
         word_regex = re.compile(word_regex)
     except re.error as err:
-        print("ERROR: invalid regular expression \"%s\" (%s)" %
+        print("ERROR: invalid --regex \"%s\" (%s)" %
               (word_regex, err), file=sys.stderr)
         parser.print_help()
         return EX_USAGE
@@ -680,7 +680,7 @@ def main(*args):
         try:
             ignore_word_regex = re.compile(options.ignore_regex)
         except re.error as err:
-            print("ERROR: invalid regular expression \"%s\" (%s)" %
+            print("ERROR: invalid --ignore-regex \"%s\" (%s)" %
                   (options.ignore_regex, err), file=sys.stderr)
             parser.print_help()
             return EX_USAGE

codespell_lib/tests/test_basic.py

@@ -2,6 +2,7 @@
 
 from __future__ import print_function
 
+import argparse
 import contextlib
 import inspect
 import os
@@ -466,6 +467,8 @@ def test_ignore_regex_flag(tmpdir, capsys):
 
     with open(op.join(d, 'flag.txt'), 'w') as f:
         f.write('# Please see http://example.com/abandonned for info\n')
+    # Test file has 1 invalid entry, and it's not ignored by default.
+    assert cs.main(f.name) == 1
     # Non-matching regex results in nothing being ignored.
     assert cs.main(f.name, '--ignore-regex=^$') == 1
     # A word can be ignored.