Fix missing space in import suffix formatting (#485)

Author: f-f

src/Dhall/Core.hs

@@ -222,7 +222,7 @@ instance Pretty Import where
       where
         suffix :: Text
         suffix = case importMode of
-            RawText -> "as Text"
+            RawText -> " as Text"
             Code    -> ""
 
 -- | Type synonym for `Import`, provided for backwards compatibility

tests/Format.hs

@@ -51,6 +51,9 @@ formatTests =
         , should
             "handle formatting sha256 imports correctly"
             "sha256Printing"
+        , should
+            "handle formatting of Import suffix correctly"
+            "importSuffix"
         ]
 
 opts :: Data.Text.Prettyprint.Doc.LayoutOptions

tests/format/importSuffixA.dhall

@@ -0,0 +1 @@
+let a = env:AAA      as Text in a

tests/format/importSuffixB.dhall

@@ -0,0 +1 @@
+let a = env:AAA as Text in a