Turn off prettify in blame view

There was a slight top padding difference in the prettified vs.
non-prettified rendering, making the region markers line up
incorrectly in some cases. Also, prettify performance is much worse in
blame view than normal file view for some reason. For sanity's sake,
turn it off for now.

Change-Id: I877b46ceba5ea9a2ba4fd774b7447e6d86c7dcc7
2 files changed