Improve rendering of new files in the diff viewer.
Review Request #4349 — Created July 19, 2013 and submitted
Improve rendering of new files in the diff viewer. New files no longer have the blank line number and code columns for the left-hand side of the diff. It just has the new code's columns.
Tested with some normal files and some new files.
This is a review from Review Bot. Tool: PEP8 Style Checker Processed Files: reviewboard/diffviewer/renderers.py Ignored Files: reviewboard/templates/diffviewer/diff_file_fragment.html