Cover Letter

Use when composing, editing, or reworking the *content* of a document that introduces a set of changes to the people who will review them -- a Linux kernel patch series cover letter (the [PATCH 0/N] blurb), a GitHub pull request description, or a merge commit message taking a topic branch. Load this whenever you decide what such a document should say -- "write the cover", "rework the cover letter to match the series", "summarize the series for submission", "write the PR description" -- even when the request does not name one. Load it also to judge a cover that already exists -- "review this cover letter", "is this cover ready to send", "does the cover match the series". G…