<%= event.action %> pull request #<%= event.pull_request.number %> (<%= event.pull_request.title %>) on <%= event.repository.display_name %>.

<%= event.user.username %> <%= event.action %> pull request #<%= event.pull_request.number %> (<%= event.pull_request.title %>) on <%= event.repository.display_name %>.

Add username to PullRequestEvent partial.
Add username to PullRequestEvent partial.
