Typos in code comments, an error message, documentation

Signed-off-by: NRalf Wildenhues <Ralf.Wildenhues@gmx.de>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Documentation/config.txt

@@ -1773,7 +1773,7 @@ submodule.<name>.ignore::
 	Using "none" (the default when this option is not set) also shows
 	submodules that have untracked files in their work tree as changed.
 	This setting overrides any setting made in .gitmodules for this submodule,
-	both settings can be overriden on the command line by using the
+	both settings can be overridden on the command line by using the
 	"--ignore-submodules" option.
 
 tar.umask::

Documentation/gitmodules.txt

@@ -56,7 +56,7 @@ submodule.<name>.ignore::
 	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
 	"--ignore-submodule" option.