Restore a deleted file

I need to restore a deleted helper file lib/helpers/formatDate.js that I accidentally removed and commit the recovery before the release cutoff. Give me the exact commands to recover it from the last commit where it existed, confirm its contents, and produce the commit message text I should use before pushing.

Before I restore the deleted file, make the recovery audit-friendly: show how to find when it was deleted and by whom, extract that revision of the file, and include a one-line explanation in the commit referencing the original deletion commit hash and why we’re restoring it. Show the exact commands and the note I should add to the PR description.

I restored lib/helpers/formatDate.js from an older commit to get the build working, but some tests now fail because behavior diverged. I don’t know whether to keep the old version, merge behaviors, or reimplement the new behavior. Recommend how to compare the deleted version to the last removed one, steps to produce a minimal reconciled file, and the pragmatic choice to make under a timebox for the release.

Our repo has several restores where someone pulled an old file back and it caused subtle bugs. Help me create a simple restore policy: how to check deletion context before recovery, when to open a ticket instead of restoring, and a short review checklist to follow when reintroducing removed code so QA isn’t surprised.