Fix typos in the documentation

Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Documentation/gitmodules.txt b/Documentation/gitmodules.txt
index 6c93202..6897794 100644
--- a/Documentation/gitmodules.txt
+++ b/Documentation/gitmodules.txt
@@ -49,7 +49,7 @@
 	submodule. If this option is also present in the submodules entry in
 	.git/config of the superproject, the setting there will override the
 	one found in .gitmodules.
-	Both settings can be overriden on the command line by using the
+	Both settings can be overridden on the command line by using the
 	"--[no-]recurse-submodules" option to "git fetch" and "git pull"..
 
 submodule.<name>.ignore::