Summary:
- Make wrap width settable in PHP.
- Dynamically generate max-width based on configurable maximum width.
- Constrain non-diff elements to standard width.
- Provide a configuration setting.
Test Plan:
Set various things to 100 / 120, as far as I could tell everything seemed to
render sensibly? This should have no effect on 80-col changes.
Reviewed By: jdperlow
Reviewers: jdperlow, tuomaspelkonen, jungejason, aran
CC: aran, jdperlow
Differential Revision: 413
