Documentation: describe 'union' low-level merge driver

diff --git a/Documentation/git-submodule.txt b/Documentation/git-submodule.txt
index 335e973a6a1d5350c1558eb68985ffe812c09212..3f59705686cf1f9605fa9c76e8009cd2a482cd9e 100644 (file)
--- a/Documentation/git-submodule.txt
+++ b/Documentation/git-submodule.txt
@@ -68,7 +68,8 @@ FILES
 When initializing submodules, a .gitmodules file in the top-level directory
 of the containing repository is used to find the url of each submodule.
 This file should be formatted in the same way as $GIR_DIR/config. The key
-to each submodule url is "submodule.$name.url".
+to each submodule url is "submodule.$name.url".  See gitlink:gitmodules[5]
+for details.
 
 
 AUTHOR