Friendlier handling when viewing the source at a commit that deletes the file.

Setup:

• Create a repo with a file called file.txt and commit. We'll refer to this commit as BASE.
• From BASE, delete the file in a commit (referred to as DELETE).
• Again from BASE, move file.txt to file2.txt, commit it (MOVE), and merge it with DELETE, preferring MOVE.
• Push to Bitbucket Server.
• View the diff of file.txt DELETE

Expected:

• A friendly message shows that says the file was deleted

Actual:

• An error message that file.txt does not exist at revision DELETE