Improve description of git-branch -d and -D in man page.

diff --git a/Documentation/git-merge-base.txt b/Documentation/git-merge-base.txt
index d1d56f194aff866f49c5d0514ce9b47def456bfd..6b71880ec45455b1e62c3e1582d4cf78f2ed4852 100644 (file)
--- a/Documentation/git-merge-base.txt
+++ b/Documentation/git-merge-base.txt
@@ -3,21 +3,31 @@ git-merge-base(1)
 
 NAME
 ----
-git-merge-base - Finds as good a common ancestor as possible for a merge
+git-merge-base - Find as good common ancestors as possible for a merge
 
 
 SYNOPSIS
 --------
-'git-merge-base' <commit> <commit>
+'git-merge-base' [--all] <commit> <commit>
 
 DESCRIPTION
 -----------
-"git-merge-base" finds as good a common ancestor as possible. Given a
-selection of equally good common ancestors it should not be relied on
-to decide in any particular way.
+
+"git-merge-base" finds as good a common ancestor as possible between
+the two commits. That is, given two commits A and B 'git-merge-base A
+B' will output a commit which is reachable from both A and B through
+the parent relationship.
+
+Given a selection of equally good common ancestors it should not be
+relied on to decide in any particular way.
 
 The "git-merge-base" algorithm is still in flux - use the source...
 
+OPTIONS
+-------
+--all::
+       Output all common ancestors for the two commits instead of
+       just one.
 
 Author
 ------
@@ -30,4 +40,3 @@ Documentation by David Greaves, Junio C Hamano and the git-list <git@vger.kernel
 GIT
 ---
 Part of the gitlink:git[7] suite
-