Fix intraline lint patch rendering

Summary: `,` -> `, ` is currently highlighted wrong.

Test Plan:
Looked at patches of these errors:

- License linter
- `0+0`
- `0,0`

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D5093