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-rw-r--r--Documentation/git-format-patch.txt10
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/git-format-patch.txt b/Documentation/git-format-patch.txt
index b41e1329a7..f8a061794d 100644
--- a/Documentation/git-format-patch.txt
+++ b/Documentation/git-format-patch.txt
@@ -23,6 +23,7 @@ SYNOPSIS
[(--reroll-count|-v) <n>]
[--to=<email>] [--cc=<email>]
[--[no-]cover-letter] [--quiet] [--notes[=<ref>]]
+ [--interdiff=<previous>]
[--progress]
[<common diff options>]
[ <since> | <revision range> ]
@@ -228,6 +229,15 @@ feeding the result to `git send-email`.
containing the branch description, shortlog and the overall diffstat. You can
fill in a description in the file before sending it out.
+--interdiff=<previous>::
+ As a reviewer aid, insert an interdiff into the cover letter,
+ or as commentary of the lone patch of a 1-patch series, showing
+ the differences between the previous version of the patch series and
+ the series currently being formatted. `previous` is a single revision
+ naming the tip of the previous series which shares a common base with
+ the series being formatted (for example `git format-patch
+ --cover-letter --interdiff=feature/v1 -3 feature/v2`).
+
--notes[=<ref>]::
Append the notes (see linkgit:git-notes[1]) for the commit
after the three-dash line.