Fix block alignment in some parser tests

tests/Language/GraphQL/AST/EncoderSpec.hs

@@ -14,12 +14,9 @@ import qualified Language.GraphQL.AST.DirectiveLocation as DirectiveLocation
 spec :: Spec
 spec = do
     describe "value" $ do
-        context "null value" $ do
-            let testNull formatter = value formatter Full.Null `shouldBe` "null"
-            it "minified" $ testNull minified
-            it "pretty" $ testNull pretty
-
         context "minified" $ do
+            it "encodes null" $
+                value minified Full.Null `shouldBe` "null"
             it "escapes \\" $
                 value minified (Full.String "\\") `shouldBe` "\"\\\\\""
             it "escapes double quotes" $
@@ -45,6 +42,9 @@ spec = do
                 it "~" $ value minified (Full.String "\x007E") `shouldBe` "\"~\""
 
         context "pretty" $ do
+            it "encodes null" $
+                value pretty Full.Null `shouldBe` "null"
+
             it "uses strings for short string values" $
                 value pretty (Full.String "Short text") `shouldBe` "\"Short text\""
             it "uses block strings for text with new lines, with newline symbol" $