Pass with --fix

src/engine/blocks.js

@@ -458,10 +458,7 @@ class Blocks {
             `<${tagName}
                 id="${block.id}"
                 type="${block.opcode}"
-                ${block.topLevel ?
+                ${block.topLevel ? `x="${block.x}" y="${block.y}"` : ''}
-                    `x="${block.x}" y="${block.y}"` :
-                    ''
-                }
             >`;
         // Add any mutation. Must come before inputs.
         if (block.mutation) {

src/engine/list.js

@@ -3,7 +3,7 @@
  * Object representing a Scratch list.
  */
 
- /**
+/**
   * @param {!string} name Name of the list.
   * @param {Array} contents Contents of the list, as an array.
   * @constructor

src/serialization/sb3.js

@@ -60,7 +60,7 @@ const parseScratchObject = function (object, runtime) {
         sprite.name = object.name;
     }
     if (object.hasOwnProperty('blocks')) {
-        for (let blockId in object.blocks) {
+        for (const blockId in object.blocks) {
             blocks.createBlock(object.blocks[blockId]);
         }
         // console.log(blocks);
@@ -100,7 +100,7 @@ const parseScratchObject = function (object, runtime) {
     const target = sprite.createClone();
     // Load target properties from JSON.
     if (object.hasOwnProperty('variables')) {
-        for (let j in object.variables) {
+        for (const j in object.variables) {
             const variable = object.variables[j];
             const newVariable = new Variable(
                 variable.id,

src/util/string-util.js

@@ -32,9 +32,9 @@ class StringUtil {
         const index = text.indexOf(separator);
         if (index >= 0) {
             return [text.substring(0, index), text.substring(index + 1)];
-        } else {
-            return [text, null];
         }
+        return [text, null];
+        
     }
 }