Adjust test suite to new Language Pragma warnigns

(this is related to #3647)

testsuite/tests/deriving/should_fail/Roles5.stderr

 
 Roles5.hs:3:8:
     Illegal role annotation
-    Perhaps you intended to use -XRoleAnnotations
+    Perhaps you intended to use RoleAnnotations
     In the data type declaration for ‛T’
 
 Roles5.hs:4:9:
     Illegal role annotation
-    Perhaps you intended to use -XRoleAnnotations
+    Perhaps you intended to use RoleAnnotations
     In the declaration for class C
 
 Roles5.hs:5:8:
     Illegal role annotation
-    Perhaps you intended to use -XRoleAnnotations
+    Perhaps you intended to use RoleAnnotations
     In the declaration for type synonym ‛S’

testsuite/tests/deriving/should_fail/T1133A.stderr

@@ -3,5 +3,5 @@ T1133A.hs:6:28:
     Can't make a derived instance of ‛Enum X’:
       ‛X’ must be an enumeration type
       (an enumeration consists of one or more nullary, non-GADT constructors)
-      Try -XGeneralizedNewtypeDeriving for GHC's newtype-deriving extension
+      Try GeneralizedNewtypeDeriving for GHC's newtype-deriving extension
     In the newtype declaration for ‛X’

testsuite/tests/deriving/should_fail/T2604.stderr

 
 T2604.hs:7:35:
     Can't make a derived instance of ‛Typeable * (DList a)’:
-      You need -XDeriveDataTypeable to derive an instance for this class
+      You need DeriveDataTypeable to derive an instance for this class
     In the data declaration for ‛DList’
 
 T2604.hs:9:38:
     Can't make a derived instance of ‛Typeable * (NList a)’:
-      You need -XDeriveDataTypeable to derive an instance for this class
+      You need DeriveDataTypeable to derive an instance for this class
     In the newtype declaration for ‛NList’

testsuite/tests/deriving/should_fail/T3833.stderr

@@ -2,5 +2,5 @@
 T3833.hs:9:1:
     Can't make a derived instance of ‛Monoid (DecodeMap e)’:
       ‛Monoid’ is not a derivable class
-      Try -XGeneralizedNewtypeDeriving for GHC's newtype-deriving extension
+      Try GeneralizedNewtypeDeriving for GHC's newtype-deriving extension
     In the stand-alone deriving instance for ‛Monoid (DecodeMap e)’

testsuite/tests/deriving/should_fail/T3834.stderr

@@ -2,5 +2,5 @@
 T3834.hs:8:1:
     Can't make a derived instance of ‛C T’:
       ‛C’ is not a derivable class
-      Try -XGeneralizedNewtypeDeriving for GHC's newtype-deriving extension
+      Try GeneralizedNewtypeDeriving for GHC's newtype-deriving extension
     In the stand-alone deriving instance for ‛C T’

testsuite/tests/deriving/should_fail/drvfail-functor1.stderr

 
 drvfail-functor1.hs:6:14:
     Can't make a derived instance of ‛Functor List’:
-      You need -XDeriveFunctor to derive an instance for this class
+      You need DeriveFunctor to derive an instance for this class
     In the data declaration for ‛List’

testsuite/tests/deriving/should_fail/drvfail015.stderr

@@ -3,7 +3,7 @@ drvfail015.hs:10:19:
     Illegal instance declaration for ‛Eq T’
       (All instance types must be of the form (T t1 ... tn)
        where T is not a synonym.
-       Use -XTypeSynonymInstances if you want to disable this.)
+       Use TypeSynonymInstances if you want to disable this.)
     In the stand-alone deriving instance for ‛Eq T’
 
 drvfail015.hs:13:1:

testsuite/tests/gadt/gadtSyntaxFail001.stderr

@@ -2,6 +2,6 @@
 gadtSyntaxFail001.hs:8:5:
     Data constructor ‛C2’ has existential type variables, a context, or a specialised result type
       C2 :: forall a. a -> Char -> Foo a Int
-      (Use -XExistentialQuantification or -XGADTs to allow this)
+      (Use ExistentialQuantification or GADTs to allow this)
     In the definition of data constructor ‛C2’
     In the data declaration for ‛Foo’

testsuite/tests/gadt/gadtSyntaxFail002.stderr

@@ -2,6 +2,6 @@
 gadtSyntaxFail002.hs:8:5:
     Data constructor ‛C2’ has existential type variables, a context, or a specialised result type
       C2 :: forall a. a -> Char -> Foo a a
-      (Use -XExistentialQuantification or -XGADTs to allow this)
+      (Use ExistentialQuantification or GADTs to allow this)
     In the definition of data constructor ‛C2’
     In the data declaration for ‛Foo’

testsuite/tests/gadt/gadtSyntaxFail003.stderr

@@ -2,6 +2,6 @@
 gadtSyntaxFail003.hs:7:5:
     Data constructor ‛C1’ has existential type variables, a context, or a specialised result type
       C1 :: forall b a c. a -> Int -> c -> Foo b a
-      (Use -XExistentialQuantification or -XGADTs to allow this)
+      (Use ExistentialQuantification or GADTs to allow this)
     In the definition of data constructor ‛C1’
     In the data declaration for ‛Foo’

testsuite/tests/generics/GenShouldFail0.stderr

 
 GenShouldFail0.hs:9:1:
     Can't make a derived instance of ‛Generic X’:
-      You need -XDeriveGeneric to derive an instance for this class
+      You need DeriveGeneric to derive an instance for this class
     In the stand-alone deriving instance for ‛Generic X’

testsuite/tests/generics/GenShouldFail1_0.stderr

 
 GenShouldFail1_0.hs:9:1:
     Can't make a derived instance of ‛Generic1 X’:
-      You need -XDeriveGeneric to derive an instance for this class
+      You need DeriveGeneric to derive an instance for this class
     In the stand-alone deriving instance for ‛Generic1 X’

testsuite/tests/ghci/prog006/prog006.stderr

 
 Boot.hs:5:13:
     Not a data constructor: ‛forall’
-    Perhaps you intended to use -XExistentialQuantification
+    Perhaps you intended to use ExistentialQuantification

testsuite/tests/ghci/scripts/ghci044.stderr

@@ -4,7 +4,7 @@
       (All instance types must be of the form (T a1 ... an)
        where a1 ... an are *distinct type variables*,
        and each type variable appears at most once in the instance head.
-       Use -XFlexibleInstances if you want to disable this.)
+       Use FlexibleInstances if you want to disable this.)
     In the instance declaration for ‛C [Int]’
 
 <interactive>:7:10:

testsuite/tests/ghci/scripts/ghci057.stderr

 
 <interactive>:5:1:
     Illegal generalised algebraic data declaration for ‛T’
-      (Use -XGADTs to allow GADTs)
+      (Use GADTs to allow GADTs)
     In the data declaration for ‛T’
 
 ghci057.hs:3:3:
     Data constructor ‛C’ has existential type variables, a context, or a specialised result type
       C :: T Int
-      (Use -XExistentialQuantification or -XGADTs to allow this)
+      (Use ExistentialQuantification or GADTs to allow this)
     In the definition of data constructor ‛C’
     In the data declaration for ‛T’
 
 ghci057.hs:3:3:
     Data constructor ‛C’ has existential type variables, a context, or a specialised result type
       C :: T Int
-      (Use -XExistentialQuantification or -XGADTs to allow this)
+      (Use ExistentialQuantification or GADTs to allow this)
     In the definition of data constructor ‛C’
     In the data declaration for ‛T’

testsuite/tests/indexed-types/should_fail/NotRelaxedExamples.stderr

@@ -2,17 +2,17 @@
 NotRelaxedExamples.hs:9:15:
     Nested type family application
       in the type family application: F1 (F1 Char)
-    (Use -XUndecidableInstances to permit this)
+    (Use UndecidableInstances to permit this)
     In the type instance declaration for ‛F1’
 
 NotRelaxedExamples.hs:10:15:
     Application is no smaller than the instance head
       in the type family application: F2 [x]
-    (Use -XUndecidableInstances to permit this)
+    (Use UndecidableInstances to permit this)
     In the type instance declaration for ‛F2’
 
 NotRelaxedExamples.hs:11:15:
     Application is no smaller than the instance head
       in the type family application: F3 [Char]
-    (Use -XUndecidableInstances to permit this)
+    (Use UndecidableInstances to permit this)
     In the type instance declaration for ‛F3’

testsuite/tests/indexed-types/should_fail/SimpleFail15.stderr

 
 SimpleFail15.hs:5:8:
     Illegal polymorphic or qualified type: a ~ b => t
-    Perhaps you intended to use -XRankNTypes or -XRank2Types
+    Perhaps you intended to use RankNTypes or Rank2Types
     In the type signature for ‛foo’:
       foo :: (a, b) -> (a ~ b => t) -> (a, b)

testsuite/tests/indexed-types/should_fail/T4485.stderr

@@ -11,7 +11,7 @@ T4485.hs:47:15:
                               (IdentityT IO) (XMLGenT Identity ())
         -- Defined at T4485.hs:42:10
     (The choice depends on the instantiation of ‛m0’
-     To pick the first instance above, use -XIncoherentInstances
+     To pick the first instance above, use IncoherentInstances
      when compiling the other instance declarations)
     In the expression: asChild
     In the expression: asChild $ (genElement "foo")

testsuite/tests/indexed-types/should_fail/T5934.stderr

@@ -2,6 +2,6 @@
 T5934.hs:12:7:
     Cannot instantiate unification variable ‛a0’
     with a type involving foralls: (forall s. GenST s) -> Int
-      Perhaps you want -XImpredicativeTypes
+      Perhaps you want ImpredicativeTypes
     In the expression: 0
     In an equation for ‛run’: run = 0

testsuite/tests/indexed-types/should_fail/TyFamUndec.stderr

@@ -2,17 +2,17 @@
 TyFamUndec.hs:6:15:
     Variable ‛b’ occurs more often than in the instance head
       in the type family application: T (b, b)
-    (Use -XUndecidableInstances to permit this)
+    (Use UndecidableInstances to permit this)
     In the type instance declaration for ‛T’
 
 TyFamUndec.hs:7:15:
     Application is no smaller than the instance head
       in the type family application: T (a, Maybe b)
-    (Use -XUndecidableInstances to permit this)
+    (Use UndecidableInstances to permit this)
     In the type instance declaration for ‛T’
 
 TyFamUndec.hs:8:15:
     Nested type family application
       in the type family application: T (a, T b)
-    (Use -XUndecidableInstances to permit this)
+    (Use UndecidableInstances to permit this)
     In the type instance declaration for ‛T’