First, we need some changes to be added; we do this by resetting the latest commit:
$ git reset 'HEAD^' Unstaged changes after reset: M liberty.txt
Now we have a modified file. To start the interactive add, we can either run the git add -i or git add -p filename. The -i option brings up an interface where all the different files in the modified state can be added interactively one at a time. The add -p/--patch option is simpler and just gives you the option to add parts of the file specified:
$ git add -p liberty.txt diff --git a/liberty.txt b/liberty.txt index 8350a2c..9638930 100644 --- a/liberty.txt +++ b/liberty.txt @@ -8,6 +8,13 @@ WW) ,WWW) 7W),WWWW' 'WWWWWW' + 9---W) + ,,--WPL=YXW=== + (P),CY:,I/X'F9P + WUT===---/===9) ...