formulaic changes need to be made to some repeating content: 3 different #emacs options:

1. Replace [regexp] heavy lifting. Can perform actual functions on match groups.
2. Macros. Easiest: hit "record", do you thing in such a way as to be ready for the very next one, save/repeat. Can be saved as a function if you love it.
3. Multiple Cursors. One-off, but the quickest if you can see your targets on the screen and don't want to think about more steps.