Documentation: describe 'union' low-level merge driver

diff --git a/Documentation/git-rev-list.txt b/Documentation/git-rev-list.txt
index 485280423e90bac43b4c372bbc8d350c34cf4fa8..a03f9fe5fadc483f47c2fbd0199f72a9619b5fcd 100644 (file)
--- a/Documentation/git-rev-list.txt
+++ b/Documentation/git-rev-list.txt
@@ -20,6 +20,7 @@ SYNOPSIS
             [ \--not ]
             [ \--all ]
             [ \--stdin ]
+            [ \--quiet ]
             [ \--topo-order ]
             [ \--parents ]
             [ \--timestamp ]
@@ -270,6 +271,14 @@ limiting may be applied.
        In addition to the '<commit>' listed on the command
        line, read them from the standard input.
 
+--quiet::
+
+       Don't print anything to standard output.  This form of
+       git-rev-list is primarily meant to allow the caller to
+       test the exit status to see if a range of objects is fully
+       connected (or not).  It is faster than redirecting stdout
+       to /dev/null as the output does not have to be formatted.
+
 --cherry-pick::
 
        Omit any commit that introduces the same change as