html-test: Always set language

from ghc-9.2 on, the “default” langauge of GHC is expected to change
more wildly. To prepare for that (and unblock
ghc/ghc!4853), this sets the
language for all the test files to `Haskell2010`. This should insolate
this test suite against changes to the default.

hoogle-test/src/Bug722/Bug722.hs

+{-# LANGUAGE Haskell2010 #-}
 {-# LANGUAGE TypeOperators, TypeFamilies #-}
 module Bug722 where
 

hoogle-test/src/Bug806/Bug806.hs

+{-# LANGUAGE Haskell2010 #-}
 {-# LANGUAGE KindSignatures #-}
 {-# LANGUAGE TypeFamilies #-}
 {-# LANGUAGE UndecidableInstances #-}

hoogle-test/src/Bug825/Bug825.hs

+{-# LANGUAGE Haskell2010 #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE TypeOperators #-}
 module Bug825 where

hoogle-test/src/Bug873/Bug873.hs

+{-# LANGUAGE Haskell2010 #-}
 module Bug873 (($), ($$)) where
 infixr 0 $$
 

hoogle-test/src/Bug946/Bug946.hs

+{-# LANGUAGE Haskell2010 #-}
 {-# LANGUAGE PatternSynonyms #-}
 module Bug946 (
   AnInt(AnInt, Zero),

hoogle-test/src/Bug992/Bug992.hs

+{-# LANGUAGE Haskell2010 #-}
 {-# LANGUAGE KindSignatures #-}
 
 module Bug992 where

hoogle-test/src/assoc-types/AssocTypes.hs

+{-# LANGUAGE Haskell2010 #-}
 {-# LANGUAGE TypeFamilies #-}
 {-# LANGUAGE AllowAmbiguousTypes #-}
 

hoogle-test/src/classes/Classes.hs

+{-# LANGUAGE Haskell2010 #-}
 module Classes where
 
 

hoogle-test/src/fixity/Fixity.hs

+{-# LANGUAGE Haskell2010 #-}
 module Fixity where
 
 

hoogle-test/src/modules/Bar.hs

+{-# LANGUAGE Haskell2010 #-}
 module Bar where
 
 

hoogle-test/src/modules/Foo.hs

+{-# LANGUAGE Haskell2010 #-}
 module Foo where
 
 

hoogle-test/src/type-sigs/ReaderT.hs

+{-# LANGUAGE Haskell2010 #-}
 module ReaderT where
 
 newtype ReaderT r m a = ReaderT { runReaderT :: r -> m a }

hoogle-test/src/type-sigs/ReaderTReexport.hs

+{-# LANGUAGE Haskell2010 #-}
 module ReaderTReexport (ReaderT(..), runReaderT) where
 
 import ReaderT

html-test/ref/A.html

@@ -38,6 +38,12 @@
 	    ><td
 	    >Safe-Inferred</td
 	    ></tr
+	  ><tr
+	  ><th
+	    >Language</th
+	    ><td
+	    >Haskell2010</td
+	    ></tr
 	  ></table
 	><p class="caption"
 	>A</p

html-test/ref/Bold.html

@@ -38,6 +38,12 @@
 	    ><td
 	    >Safe-Inferred</td
 	    ></tr
+	  ><tr
+	  ><th
+	    >Language</th
+	    ><td
+	    >Haskell2010</td
+	    ></tr
 	  ></table
 	><p class="caption"
 	>Bold</p

html-test/ref/Bug1.html

@@ -38,6 +38,12 @@
 	    ><td
 	    >Safe-Inferred</td
 	    ></tr
+	  ><tr
+	  ><th
+	    >Language</th
+	    ><td
+	    >Haskell2010</td
+	    ></tr
 	  ></table
 	><p class="caption"
 	>Bug1</p

html-test/ref/Bug1004.html

@@ -38,6 +38,12 @@
 	    ><td
 	    >Safe-Inferred</td
 	    ></tr
+	  ><tr
+	  ><th
+	    >Language</th
+	    ><td
+	    >Haskell2010</td
+	    ></tr
 	  ></table
 	><p class="caption"
 	>Bug1004</p

html-test/ref/Bug1033.html

@@ -38,6 +38,12 @@
 	    ><td
 	    >Safe-Inferred</td
 	    ></tr
+	  ><tr
+	  ><th
+	    >Language</th
+	    ><td
+	    >Haskell2010</td
+	    ></tr
 	  ></table
 	><p class="caption"
 	>Bug1033</p

html-test/ref/Bug1035.html

@@ -38,6 +38,12 @@
 	    ><td
 	    >Safe-Inferred</td
 	    ></tr
+	  ><tr
+	  ><th
+	    >Language</th
+	    ><td
+	    >Haskell2010</td
+	    ></tr
 	  ></table
 	><p class="caption"
 	>Bug1035</p

html-test/ref/Bug1050.html

@@ -38,6 +38,12 @@
 	    ><td
 	    >Safe-Inferred</td
 	    ></tr
+	  ><tr
+	  ><th
+	    >Language</th
+	    ><td
+	    >Haskell2010</td
+	    ></tr
 	  ></table
 	><p class="caption"
 	>Bug1050</p