We use camelCase for local variables
Set display name when sending diff to TextMate

We set the name as:

	'---/+++ file'

I wanted the display name to suggest a diff without calling it something directly as "file (diff)", so I thought '---/+++' would be a nice and condense way of indicating that.
Show last commit message in the Previous Commit Messages menu

This was previously set to a pop-up menu, hence the need for a placeholder item to set the menu title. However, for pull-down menus, the first item is used as the title and remains fixed.

This difference in behavior caused the last used commit message (first item) not to be listed in the menu.