4025 Autocomplete won't match words in quotes or parentheses

https://code.google.com/p/otwarchive/issues/detail?id=4025

The wranglers were sad because people were typing Bucky into the character field and not getting the James "Bucky" Barnes tag in autocorrect. The wranglers will hopefully not be sad after this!

Funny story, though: I tried writing some hacky tests for this, but then I realized they passed even when I tried to make them fail. So I tried to make an existing scenario fail by switching `Then I should see "jb_fletcher" in the autocomplete` to `Then I should not see "jb_fletcher" in the autocomplete"`... and it continued to pass. So that's my excuse for the lack of tests.
heya - dunno if you saw [this comment](https://code.google.com/p/otwarchive/issues/detail?id=2920#c5) on the merged-in issue, but any chance to split on the tilde, too?