Currently, longer commit messages in a review request go beyond the page width. 

Using a css fix, the commit address this issue.

I have attached two files (Screenshots)
'Beyond_page.png': Showing the way it looked before the fix

'Within_page.png': Showing the way it looks with the fix.

(Update) 'Wrapped_message.png': Screenshot of the latest fix where long texts are wrapped.
Tested on Chrome on MacOS.
Instruciton to replicate the issue:

Create a review request with a long commit message.
Make your web brower window's width shorter than the summary length in "Commits" section.

Expected result: The longer commit messages does not go past the page width.