Merge branch 'jc/post-checkout-doc' into next

Doc update.

* jc/post-checkout-doc:
  doc: clarify how exit status of post-checkout hook is used

Documentation/githooks.txt

@@ -193,7 +193,9 @@ worktree.  The hook is given three parameters: the ref of the previous HEAD,
 the ref of the new HEAD (which may or may not have changed), and a flag
 indicating whether the checkout was a branch checkout (changing branches,
 flag=1) or a file checkout (retrieving a file from the index, flag=0).
-This hook cannot affect the outcome of `git switch` or `git checkout`.
+This hook cannot affect the outcome of `git switch` or `git checkout`,
+other than that the hook's exit status becomes the exit status of
+these two commands.
 
 It is also run after linkgit:git-clone[1], unless the `--no-checkout` (`-n`) option is
 used. The first parameter given to the hook is the null-ref, the second the