style fixes

lib/6to5/generation/generators/jsx.js

@@ -75,6 +75,4 @@ exports.JSXClosingElement = function (node, print) {
   this.push(">");
 };
 
-exports.JSXEmptyExpression = function () {
-
-};
+exports.JSXEmptyExpression = function () {};

lib/6to5/register-cache.js

@@ -12,14 +12,6 @@ exports.save = function () {
 };
 
 exports.load = function () {
-  if (!fs.existsSync(FILENAME)) return;
-
-  try {
-    data = JSON.parse(fs.readFileSync(FILENAME));
-  } catch (err) {
-    return;
-  }
-
   process.on("exit", exports.save);
 
   var sigint = function () {
@@ -29,6 +21,14 @@ exports.load = function () {
   };
 
   process.on("SIGINT", sigint);
+
+  if (!fs.existsSync(FILENAME)) return;
+
+  try {
+    data = JSON.parse(fs.readFileSync(FILENAME));
+  } catch (err) {
+    return;
+  }
 };
 
 exports.get = function () {

lib/6to5/transformation/transformers/other/self-contained.js

@@ -60,6 +60,10 @@ var astVisitor = {
 
 exports.optional = true;
 
+exports.manipulateOptions = function (opts) {
+  if (opts.whitelist.length) opts.whitelist.push("es6.modules");
+};
+
 exports.ast = {
   enter: function (ast, file) {
     file.setDynamic("runtimeIdentifier", function () {