google-diff-match-patch will produce some very nice prose diffs, especially if you tune the defaults a little to look further back/ahead. <a href="https://code.google.com/p/google-diff-match-patch/" rel="nofollow">https://code.google.com/p/google-diff-match-patch/</a> - it is availabke in Java, JavaScript, Dart, C++, C#, Objective C, Lua and Python.