merge(third_party/git): Merge squashed git subtree at v2.23.0

Merge commit '1b593e1ea4' as 'third_party/git'

third_party/git/Documentation/git-request-pull.txt

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+git-request-pull(1)
+===================
+
+NAME
+----
+git-request-pull - Generates a summary of pending changes
+
+SYNOPSIS
+--------
+[verse]
+'git request-pull' [-p] <start> <url> [<end>]
+
+DESCRIPTION
+-----------
+
+Generate a request asking your upstream project to pull changes into
+their tree.  The request, printed to the standard output,
+begins with the branch description, summarizes
+the changes and indicates from where they can be pulled.
+
+The upstream project is expected to have the commit named by
+`<start>` and the output asks it to integrate the changes you made
+since that commit, up to the commit named by `<end>`, by visiting
+the repository named by `<url>`.
+
+
+OPTIONS
+-------
+-p::
+	Include patch text in the output.
+
+<start>::
+	Commit to start at.  This names a commit that is already in
+	the upstream history.
+
+<url>::
+	The repository URL to be pulled from.
+
+<end>::
+	Commit to end at (defaults to HEAD).  This names the commit
+	at the tip of the history you are asking to be pulled.
++
+When the repository named by `<url>` has the commit at a tip of a
+ref that is different from the ref you have locally, you can use the
+`<local>:<remote>` syntax, to have its local name, a colon `:`, and
+its remote name.
+
+
+EXAMPLES
+--------
+
+Imagine that you built your work on your `master` branch on top of
+the `v1.0` release, and want it to be integrated to the project.
+First you push that change to your public repository for others to
+see:
+
+	git push https://git.ko.xz/project master
+
+Then, you run this command:
+
+	git request-pull v1.0 https://git.ko.xz/project master
+
+which will produce a request to the upstream, summarizing the
+changes between the `v1.0` release and your `master`, to pull it
+from your public repository.
+
+If you pushed your change to a branch whose name is different from
+the one you have locally, e.g.
+
+	git push https://git.ko.xz/project master:for-linus
+
+then you can ask that to be pulled with
+
+	git request-pull v1.0 https://git.ko.xz/project master:for-linus
+
+
+GIT
+---
+Part of the linkgit:git[1] suite