SourceTree 4.2 Not Showing Diff

[jmfrancia]

I've been using SourceTree for my whole career, and it always showed the file diff on the file status screen. For some reason the diffs have disappeared. I've been cycling through every setting I can find trying to turn it back on, but can't seem to get it displaying again. 

The files in question are not part of submodules, they are not huge changes, and they are to regular code files. I just want to double-check that I'm not committing old comments or anything like that before I push. 

See screenshot for example (file names redacted due to strict NDA).

[jmfrancia]

I solved it. The file diff can apparently be collapsed to zero width, which I'm assuming is a bug. So you just have to really, really carefully find the edge on the right with your mouse and drag it back out. In case anyone else needs help with this.