You can't do that in github as far as I know, but you can get git to display diffs that way (eg. for local review or email based workflows). You have to use a git "orderfile". Example:

https://gitlab.com/nbdkit/nbdkit/-/blob/master/scripts/git.o...

We found it useful to display header files, interface files and documentation first, but maybe the linked paper will make us review that!

Github similarly lacks the ability to override the diff algorithm. This is a shame, because `histogram` makes some diffs look much more like what the human intended.

The default, Myers, is from 1986!