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
https://gitlab.haskell.org/ghc/ghc/-/merge_requests/4853), this sets the
language for all the test files to `Haskell2010`. This should insolate
this test suite against changes to the default.

Cherry-picked from https://github.com/haskell/haddock/pull/1341

13 files changed, 13 insertions, 0 deletions

diff --git a/hoogle-test/src/Bug722/Bug722.hs b/hoogle-test/src/Bug722/Bug722.hs
index a33d5b24..ef7e9a2f 100644
--- a/hoogle-test/src/Bug722/Bug722.hs
+++ b/hoogle-test/src/Bug722/Bug722.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Haskell2010 #-}
 {-# LANGUAGE TypeOperators, TypeFamilies #-}
 module Bug722 where
 
diff --git a/hoogle-test/src/Bug806/Bug806.hs b/hoogle-test/src/Bug806/Bug806.hs
index 45efda77..6deb98c1 100644
--- a/hoogle-test/src/Bug806/Bug806.hs
+++ b/hoogle-test/src/Bug806/Bug806.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Haskell2010 #-}
 {-# LANGUAGE KindSignatures #-}
 {-# LANGUAGE TypeFamilies #-}
 {-# LANGUAGE UndecidableInstances #-}
diff --git a/hoogle-test/src/Bug825/Bug825.hs b/hoogle-test/src/Bug825/Bug825.hs
index bfe07139..48c09305 100644
--- a/hoogle-test/src/Bug825/Bug825.hs
+++ b/hoogle-test/src/Bug825/Bug825.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Haskell2010 #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE TypeOperators #-}
 module Bug825 where
diff --git a/hoogle-test/src/Bug873/Bug873.hs b/hoogle-test/src/Bug873/Bug873.hs
index 3a9a5383..4df1b772 100644
--- a/hoogle-test/src/Bug873/Bug873.hs
+++ b/hoogle-test/src/Bug873/Bug873.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Haskell2010 #-}
 module Bug873 (($), ($$)) where
 infixr 0 $$
 
diff --git a/hoogle-test/src/Bug946/Bug946.hs b/hoogle-test/src/Bug946/Bug946.hs
index 606b5ac4..ec567d6d 100644
--- a/hoogle-test/src/Bug946/Bug946.hs
+++ b/hoogle-test/src/Bug946/Bug946.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Haskell2010 #-}
 {-# LANGUAGE PatternSynonyms #-}
 module Bug946 (
   AnInt(AnInt, Zero),
diff --git a/hoogle-test/src/Bug992/Bug992.hs b/hoogle-test/src/Bug992/Bug992.hs
index bd772427..0b03964b 100644
--- a/hoogle-test/src/Bug992/Bug992.hs
+++ b/hoogle-test/src/Bug992/Bug992.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Haskell2010 #-}
 {-# LANGUAGE KindSignatures #-}
 
 module Bug992 where
diff --git a/hoogle-test/src/assoc-types/AssocTypes.hs b/hoogle-test/src/assoc-types/AssocTypes.hs
index ceacc834..3fa5f034 100644
--- a/hoogle-test/src/assoc-types/AssocTypes.hs
+++ b/hoogle-test/src/assoc-types/AssocTypes.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Haskell2010 #-}
 {-# LANGUAGE TypeFamilies #-}
 {-# LANGUAGE AllowAmbiguousTypes #-}
 
diff --git a/hoogle-test/src/classes/Classes.hs b/hoogle-test/src/classes/Classes.hs
index 23f68499..2bd726a2 100644
--- a/hoogle-test/src/classes/Classes.hs
+++ b/hoogle-test/src/classes/Classes.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Haskell2010 #-}
 module Classes where
 
 
diff --git a/hoogle-test/src/fixity/Fixity.hs b/hoogle-test/src/fixity/Fixity.hs
index 3af38117..122bd4f8 100644
--- a/hoogle-test/src/fixity/Fixity.hs
+++ b/hoogle-test/src/fixity/Fixity.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Haskell2010 #-}
 module Fixity where
 
 
diff --git a/hoogle-test/src/modules/Bar.hs b/hoogle-test/src/modules/Bar.hs
index 156a835f..86e2648b 100644
--- a/hoogle-test/src/modules/Bar.hs
+++ b/hoogle-test/src/modules/Bar.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Haskell2010 #-}
 module Bar where
 
 
diff --git a/hoogle-test/src/modules/Foo.hs b/hoogle-test/src/modules/Foo.hs
index 6581fe4c..947da4ce 100644
--- a/hoogle-test/src/modules/Foo.hs
+++ b/hoogle-test/src/modules/Foo.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Haskell2010 #-}
 module Foo where
 
 
diff --git a/hoogle-test/src/type-sigs/ReaderT.hs b/hoogle-test/src/type-sigs/ReaderT.hs
index 009c7ed2..fb09bac0 100644
--- a/hoogle-test/src/type-sigs/ReaderT.hs
+++ b/hoogle-test/src/type-sigs/ReaderT.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Haskell2010 #-}
 module ReaderT where
 
 newtype ReaderT r m a = ReaderT { runReaderT :: r -> m a }
diff --git a/hoogle-test/src/type-sigs/ReaderTReexport.hs b/hoogle-test/src/type-sigs/ReaderTReexport.hs
index 21fa44ee..b995bba8 100644
--- a/hoogle-test/src/type-sigs/ReaderTReexport.hs
+++ b/hoogle-test/src/type-sigs/ReaderTReexport.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE Haskell2010 #-}
 module ReaderTReexport (ReaderT(..), runReaderT) where
 
 import ReaderT