fast-import: tighten M 040000 syntax

diff --git a/Documentation/git-fmt-merge-msg.txt b/Documentation/git-fmt-merge-msg.txt
index 302f56b88941cfaa002a8b75c078335bf8d86276..40dba8c0a9f308064f67d8f38ce8a22b2a42a77c 100644 (file)
--- a/Documentation/git-fmt-merge-msg.txt
+++ b/Documentation/git-fmt-merge-msg.txt
@@ -9,8 +9,8 @@ git-fmt-merge-msg - Produce a merge commit message
 SYNOPSIS
 --------
 [verse]
-'git fmt-merge-msg' [-m <message>] [--log | --no-log] <$GIT_DIR/FETCH_HEAD
-'git fmt-merge-msg' [-m <message>] [--log | --no-log] -F <file>
+'git fmt-merge-msg' [-m <message>] [--log[=<n>] | --no-log] <$GIT_DIR/FETCH_HEAD
+'git fmt-merge-msg' [-m <message>] [--log[=<n>] | --no-log] -F <file>
 
 DESCRIPTION
 -----------
@@ -24,10 +24,12 @@ automatically invoking 'git merge'.
 OPTIONS
 -------
 
---log::
+--log[=<n>]::
        In addition to branch names, populate the log message with
        one-line descriptions from the actual commits that are being
-       merged.
+       merged.  At most <n> commits from each merge parent will be
+       used (20 if <n> is omitted).  This overrides the `merge.log`
+       configuration variable.
 
 --no-log::
        Do not list one-line descriptions from the actual commits being
@@ -52,8 +54,10 @@ CONFIGURATION
 -------------
 
 merge.log::
-       Whether to include summaries of merged commits in newly
-       merge commit messages. False by default.
+       In addition to branch names, populate the log message with at
+       most the specified number of one-line descriptions from the
+       actual commits that are being merged.  Defaults to false, and
+       true is a synoym for 20.
 
 merge.summary::
        Synonym to `merge.log`; this is deprecated and will be removed in