bug#57400: 29.0.50; Support sending patches from VC directly

[Richard Stallman]

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  > In case of vc-git-diff, it just runs `git diff-index` to compare
  > to the working tree.  However, 'C-u C-x v =' raises more questions:

  > 1. When used on one file, for the default value of the old revision,
  > it converts the name "HEAD" of the current branch to its unabbreviated
  > hash number.  So the question is why not leave it alone
  > and display the default value "HEAD" as is?

  > 2. When used on many files, there is no default value.
  > But why not use the same "HEAD" even in case of multiple files?

Are you proposing to change C-u C-x v =?  Or asking what this
new command should do?

-- 
Dr Richard Stallman (https://stallman.org)
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)