codemirror/CodeMirror — pull request #2972 by nextrevision (2014-12-10 03:42:29+00:00)
Title: Fix infinite loop when adding a capital in puppet syntax

A loop is caused in the Puppet mode when adding a capital letter due to an incomplete regex match and use of the backUp function. Resolving this issue required checking for a full match against the word before calling backUp on the stream.

To replicate, simply type any capital letter after a series of characters or at the beginning of a line:
```
A
```