Ultimately Sourcetree relies on the 'git diff' command for that information. Typically you will see that if the file is binary or encoded as something other than ASCII.
You can see what git thinks the diff is by opening the Terminal and running git diff against that file. See https://git-scm.com/docs/git-diff
Supported Platforms macOS Windows To make using Sourcetree as simple yet powerful as possible we embed (bundle) dependencies such as Git, Git LFS, and Mercurial. We strive to keep these...
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