Fix overridable written with an extra 'e'

Signed-off-by: Nanako Shiraishi <nanako3@lavabit.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-gc.txt

@@ -61,7 +61,7 @@ automatic consolidation of packs.
 
 --prune=<date>::
 	Prune loose objects older than date (default is 2 weeks ago,
-	overrideable by the config variable `gc.pruneExpire`).  This
+	overridable by the config variable `gc.pruneExpire`).  This
 	option is on by default.
 
 --no-prune::

gitweb/gitweb.perl

@@ -376,7 +376,7 @@ sub gitweb_get_feature {
 		@{$feature{$name}{'default'}});
 	if (!$override) { return @defaults; }
 	if (!defined $sub) {
-		warn "feature $name is not overrideable";
+		warn "feature $name is not overridable";
 		return @defaults;
 	}
 	return $sub->(@defaults);