Merge pull request #20381 from colindean/patch-1

diagnostic: Use pushd/popd in uncommited modifications nudge

Author: p-linnane

Library/Homebrew/diagnostic.rb

@@ -703,7 +703,7 @@ def check_git_status
             If this is a surprise to you, then you should stash these modifications.
             Stashing returns Homebrew to a pristine state but can be undone
             should you later need to do so for some reason.
-              cd #{path} && git stash -u && git clean -d -f
+              git -C "#{path}" stash -u && git -C "${path}" clean -d -f
           EOS
 
           modified = status.split("\n")