by There are plenty of ways to keep track of changes made to a text document. You can use the track-changes tools built into your word processor (assuming it has them). If your needs are more sophisticated, particularly if you’re collaborating with others, you can use a sophisticated version-control system such as Github, Subversion, CVS. Or you can use a dedicated utility such as Kaleidoscope (which can compare documents, images, and even folders).
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