Failing test with return not on the same line as it's expression

Note that this is not a parenthesis issue but this was the easiest way
to reproduce it. I ran into it when testing generators with `retainLines`
and the generated `return` statement (replacing yeild) was printed on
the line preceding the expression being yielded.

test/core/fixtures/generation/edgecase/return-with-retainlines-option/actual.js

@@ -0,0 +1,5 @@
+function foo(l) {
+  return (
+    l
+  );
+}

test/core/fixtures/generation/edgecase/return-with-retainlines-option/expected.js

@@ -0,0 +1,2 @@
+function foo(l) {
+  return l;}

test/core/fixtures/generation/edgecase/return-with-retainlines-option/options.json

@@ -0,0 +1,3 @@
+{
+  "retainLines": true
+}