Why oh why did I forget vimdiff ?

 Whilst trying to compare two branches of a GitHub repo on my Mac, I was using diff to compare/contrast specific files, and trying to parse the differences.

And then I remembered vimdiff

Source: Linux `Vimdiff` Command – How to Compare Two Files in the Command Line 

PS Using freeCodeCamp for the above image, as I don't want to reveal my sources ( i.e. source code )