[NOID] Solves populated git-diff index bug when no changes have happened

[ncordon]

What

Solves bug in bot to format / update licenses where git diff-index could be returning results even if no files have had updates.

This bug probably is present in the monorepo as I copied those files from there.

Why

For reference the answer to this question https://stackoverflow.com/questions/3878624/how-do-i-programmatically-determine-if-there-are-uncommitted-changes

if there are files that have been touched, but whose contents are the same as in the index, you'll need to run git update-index --refresh before git diff-index, otherwise diff-index will incorrectly report that the tree is dirty)

This is causing the /generateLicenses command to fail when the licenses are all good:

[Lojjs]

Nice catch, I guess as you are saying that we should do same thing to monorepo too