tab and enter key not functioning on every html file in atom

### Prerequisites

* [ ] Put an X between the brackets on this line if you have done all of the following:
* Reproduced the problem in Safe Mode: http://flight-manual.atom.io/hacking-atom/sections/debugging/#using-safe-mode
* Followed all applicable steps in the debugging guide: http://flight-manual.atom.io/hacking-atom/sections/debugging/
* Checked the FAQs on the message board for common solutions: https://discuss.atom.io/c/faq
* Checked that your issue isn't already filed: https://github.com/issues?utf8=✓&q=is%3Aissue+user%3Aatom
* Checked that there is not already an Atom package that provides the described functionality: https://atom.io/packages

### Description

[Description of the issue]

### Steps to Reproduce

1. [First Step]
2. [Second Step]
3. [and so on...]

**Expected behavior:** [What you expect to happen]

**Actual behavior:** [What actually happens]

**Reproduces how often:** [What percentage of the time does it reproduce?]

### Versions

You can get this information from copy and pasting the output of `atom --version` and `apm --version` from the command line. Also, please include the OS and what version of the OS you're running.

### Additional Information

Any additional information, configuration or data that might be necessary to reproduce the issue.

The issue contains only Atom's standard template and names no files, tests, versions, reproduction steps, or expected and actual behavior. Start by obtaining those missing details and a minimal HTML-file reproduction; the work is complete only when the Tab and Enter behavior is reproduced and verified as corrected across the affected files.

Written by the indexing model from the issue text.