Update commit preflight script to halt if there are no changes to be committed.
Update commit preflight script to halt if there are no changes to be committed.

If there is nothing staged for commit, and the working directory matches the most recent commit, don’t bother running the preflight steps since there’s nothing to commit.

grantneufeld/Wayground,grantneufeld/Wayground,grantneufeld/Wayground,grantneufeld/Wayground