René Scharfe 91f8f7e46f 2.36 format-patch regression fix ...

e900d494dc (diff: add an API for deferred freeing, 2021-02-11) added a
way to allow reusing diffopts: the no_free bit.  244c27242f (diff.[ch]:
have diff_free() call clear_pathspec(opts.pathspec), 2022-02-16) made
that mechanism mandatory.

git format-patch only sets no_free when --output is given, causing it to
forget pathspecs after the first commit.  Set no_free unconditionally
instead.

The existing test was unable to detect this breakage because it checks
stderr for the absence of a certain string, but format-patch writes to
stdout.  Also the test was not checking the case of one commit modifying
multiple files and a pathspec limiting the diff.  Replace it with a more
thorough one.

Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

2022-04-30 11:49:59 -07:00

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