Here is a restyle and rework of some parts on the Pull Request Page.

• Reworked the changes summary in the sidebar, making things fit a little better, and adding labels for the lines added and removed to make them green and red (issue #932)
• added anchor links to each diff in the files_changed tab, and provide a link in the changes summary sidebar that points to the anchor, so you can click on it to vew the diff
• reworked how we show if a file is renames in the changes summary (issue #887). Also added logic to show to the user if a file is added, or removed as well.
• show the lines added and removed in each diff in the files changed tab
• remove the "view" link, and put that link on the filename itself
• added some logic to show a helpful message rather than an empty code display if:
  • a file is added, and it is empty
  • a file is renamed, but no change happened to the file part of issue #887

Here is the before and after shots of the same page:

After:

Before: