Move helper into Helpers dir.

gren.cabal

@@ -239,7 +239,7 @@ Test-Suite gren-tests
 
     other-modules:
         Helpers.Instances
-        Parse.Helpers
+        Helpers.Parse
 
         -- tests
         Parse.SpaceSpec

tests/Helpers/Parse.hs

@@ -1,6 +1,6 @@
 {-# LANGUAGE OverloadedStrings #-}
 
-module Parse.Helpers
+module Helpers.Parse
   ( checkParse,
     checkSuccessfulParse,
     checkParseError,

tests/Parse/UnderscorePatternSpec.hs

@@ -6,8 +6,8 @@ import AST.Source qualified as Src
 import Data.ByteString qualified as BS
 import Data.Name qualified as Name
 import Helpers.Instances ()
+import Helpers.Parse qualified as Helpers
 import Parse.Expression qualified as Expression
-import Parse.Helpers qualified as Helpers
 import Parse.Pattern qualified as Pattern
 import Reporting.Error.Syntax qualified as Error.Syntax
 import Test.Hspec (Spec, describe, it)