Don't check for Haskell's "curly braces" indentation

PureScript doesn't support "curly braces" mode as Haskell does, so the
only thing the code did was introducing some bug where mixing let-in
and case-of statements were breaking indentation.

Credits to @purefunctor for the solution.

Fixes: #12

Author: Hi-Angel

purescript-indentation.el

@@ -762,9 +762,7 @@ indent the current line. This has to be fixed elsewhere."
            (throw 'parse-end nil)))))
 
 (defun purescript-indentation-layout (parser)
-  (if (string= current-token "{")
-      (purescript-indentation-list parser "}" ";" nil)
-    (purescript-indentation-implicit-layout-list parser)))
+  (purescript-indentation-implicit-layout-list parser))
 
 (defun purescript-indentation-expression-token (token)
   (member token '("if" "let" "do" "case" "\\" "(" "[" "{" "::"

tests/purescript-indentation-tests.el

@@ -237,3 +237,29 @@ foo = do
   identifier :: Array String <- function call
   _ <- another call
   pure unit"))
+
+(ert-deftest let-in-separate-lines ()
+  "Tests bug #12"
+  (purescript-test-indentation "
+test1 a
+= let { x } = a
+in x"
+
+"
+test1 a
+  = let { x } = a
+    in x"))
+
+(ert-deftest case-of-separate-lines ()
+  "Tests bug #12"
+  (purescript-test-indentation "
+test3 a
+= case a of
+{ x: y }
+-> y"
+
+ "
+test3 a
+  = case a of
+    { x: y }
+      -> y"))