Subject: Is cover letter can save changes?

From: fuyao <[email-masked]>
Date: Tue, 20 Oct 2020 15:05:47 +0800

Hi:
   i have question about format-patch.

   when use git format-patch with --cover-letter, we add information
   in the cover letter. and then, i must send patch with -v2, the
   information in the cover letter is lost in the v2 patch.

   i found git notes can note things, but it add in patch not
   cover letter. is some operate can do to save in cover letter.

   and the git note record with commit, when amend it can lost note,
   is the rewrite error?
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