[jimktrains2]

git add -p

       -p, --patch
           Interactively choose hunks of patch between the index and the work
           tree and add them to the index. This gives the user a chance to
           review the difference before adding modified contents to the index.

           This effectively runs add --interactive, but bypasses the initial
           command menu and directly jumps to the patch subcommand. See
           “Interactive mode” for details.