Merge pull request kovetskiy#22 from blang/master

Fix tests after pluralization-fix in output messages

Author: kovetskiy

tests/-I-adds-submodule-of-specified-dependency.test.sh

@@ -12,7 +12,7 @@ GO
 
 tests:ensure :manul -I github.com/kovetskiy/manul-test-foo
 tests:assert-no-diff stdout <<VENDORS
-added 1 submodules
+added 1 submodule
 VENDORS
 
 tests:assert-stderr "adding submodule for github.com/kovetskiy/manul-test-foo"