Hardcode to double quotes, indent to 2 spaces (#5824)

packages/babel-plugin-transform-regenerator/test/fixtures/variable-renaming/retain-lines/expected.js

@@ -1,6 +1,6 @@
 var func = regeneratorRuntime.mark(function _callee() {var actual;return regeneratorRuntime.wrap(function _callee$(_context) {while (1) switch (_context.prev = _context.next) {case 0:_context.next = 2;return (
-                    obj.
-                    method().
-                    method2());case 2:
+          obj.
+          method().
+          method2());case 2:
 
-                actual = true;case 3:case "end":return _context.stop();}}, _callee, this);});
+        actual = true;case 3:case "end":return _context.stop();}}, _callee, this);});