doc/read-tree: remove obsolete remark

diff --git a/Documentation/gitmodules.txt b/Documentation/gitmodules.txt
index 10dcc08ff9977ecd0803915aade4b58a27495bbf..8f7c50f330f36f625951db7f4cc4657a31fa7113 100644 (file)
--- a/Documentation/gitmodules.txt
+++ b/Documentation/gitmodules.txt
@@ -50,8 +50,11 @@ submodule.<name>.update::
 
 submodule.<name>.branch::
        A remote branch name for tracking updates in the upstream submodule.
-       If the option is not specified, it defaults to 'master'.  See the
-       `--remote` documentation in linkgit:git-submodule[1] for details.
+       If the option is not specified, it defaults to 'master'.  A special
+       value of `.` is used to indicate that the name of the branch in the
+       submodule should be the same name as the current branch in the
+       current repository.  See the `--remote` documentation in
+       linkgit:git-submodule[1] for details.
 
 submodule.<name>.fetchRecurseSubmodules::
        This option can be used to control recursive fetching of this