Some default words not censored about better_profanity

[snguyenthanh]

What do you think about adding ! to char i and + to char t in the CHAR_MAPPING variable: https://github.com/snguyenthanh/better_profanity/blob/master/better_profanity/better_profanity.py#L33-L42

[jcbrockschmidt]

@snguyenthanh I think we should, yeah. That will fix the issue for these particular words.

We should also display a warning message to let the user know when a words/phrase is invalid and won't be censored.

[jcbrockschmidt]

I tried adding "!" to ALLOWED_CHARACTERS and it caused test_unicode_vietnamese_2 to fail:

FAIL: test_unicode_vietnamese_2 (__main__.ProfanityUnicodeTestVietnamese)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "tests.py", line 176, in test_unicode_vietnamese_2
    self.assertEqual(profanity.censor(bad_text), censored_text)
AssertionError: 'Con chó sủa **** gâu!' != 'Con chó sủa **** ****!'
- Con chó sủa **** gâu!
?                  ^^^
+ Con chó sủa **** ****!
?                  ^^^^

If a swear word ends with a "!", it will be ignored when "!" is an allowed character.

Here's a unit test we can use to test punctuation:

    def test_punctuation(self):
        bad_text = "Holy shit! Oh fuck, damn. What the hell? Shut up, asshole..."
        censored_text = "Holy ****! Oh ****, ****. What the ****? Shut up, ****..."
        self.assertEqual(profanity.censor(bad_text), censored_text)