More tweaks. I am more or less happy now.

README.md

@@ -1,29 +1,18 @@
 # git-tidy
 
-Have you ever come back to a git repo after a while, started developing, and
-then realised you weren't on the main branch, or your branch was missing the
-latest changes, so you ended up with merge conflicts?
+I wrote this utility to save myself some repetitive typing, because I often come
+back to a repo after a while of not using it, and in the meanwhile a remote may
+have moved on or I'm not sure what state it's in.
 
-Or have you ever finished working on a feature, completed a pull-request online,
-and wanted an easy way to clean up your local repo from all the unused
-references that have accumulated themselves?
+So this gets it cleaned up relatively quickly.
 
-Then `git-tidy` is for you!
+It's more or less the equivalent of
 
-This is a simple Python script which you can install by copying (or symlinking)
-anywhere on your path (I recommend ~/bin/, but something like /usr/local/bin/
-would also work).
-
-Entering
 ```bash
-git tidy
+git checkout main
+git fetch --all --purge  # purge is to delete unnecessary remote refs
+git merge origin/main main --ff-only
+git branch --merged | grep -v main | xargs git branch -d
 ```
-at the terminal will:
-- Check out the default branch, usually `main`
-  -  if this is not configured, it will try to figure out what it should be,
-- Pull to make sure that you're up-to-date with the default branch,
-- Delete all branches that have already been merged into the default, and,
-- Delete all references which have been removed from the remote as well,
 
-leaving you with a pristine, tidy repository in order to continue your
-development.
+with some extra convenience and (I hope) safety features.