Based on one of the screenshots, it looks like Guitar doesn't support word diffing. Sourcetree lacks word diffing as well and has had an issue about it since 2012: https://jira.atlassian.com/browse/SRCTREE-888
Could you report this feature request to dev?[0]
You can see it in Fork's screenshot: https://git-fork.com/images/diffViewer.jpg
But if you look at Guitar's, you'll see the lack of word diffing, and that makes it take significantly longer to see exactly what changed: https://camo.githubusercontent.com/3c6c338ece93afda723cef575...