Use consistent function declaration style

src/engine/adapter.js

@@ -35,7 +35,7 @@ var domToBlocks = function (blocksDOM) {
  * @param {Object} e `Blockly.events.create`
  * @return {Array.<Object>} List of blocks from this CREATE event.
  */
-module.exports = function (e) {
+var adapter = function (e) {
     // Validate input
     if (typeof e !== 'object') return;
     if (typeof e.xml !== 'object') return;
@@ -146,3 +146,5 @@ var domToBlock = function (blockDOM, blocks, isTopBlock, parent) {
         }
     }
 };
+
+module.exports = adapter;

src/engine/list.js

@@ -8,7 +8,9 @@
   * @param {Array} contents Contents of the list, as an array.
   * @constructor
   */
-module.exports = function List (name, contents) {
+var List = function (name, contents) {
     this.name = name;
     this.contents = contents;
 };
+
+module.exports = List;

src/engine/mutation-adapter.js

@@ -27,7 +27,7 @@ var mutatorTagToObject = function (dom) {
  * @param {(Object|string)} mutation Mutation XML string or DOM.
  * @return {Object} Object representing the mutation.
  */
-module.exports = function (mutation) {
+var mutationAdpater = function (mutation) {
     var mutationParsed;
     // Check if the mutation is already parsed; if not, parse it.
     if (typeof mutation === 'object') {
@@ -37,3 +37,5 @@ module.exports = function (mutation) {
     }
     return mutatorTagToObject(mutationParsed);
 };
+
+module.exports = mutationAdpater;

src/engine/variable.js

@@ -9,8 +9,10 @@
  * @param {boolean} isCloud Whether the variable is stored in the cloud.
  * @constructor
  */
-module.exports = function Variable (name, value, isCloud) {
+var Variable = function (name, value, isCloud) {
     this.name = name;
     this.value = value;
     this.isCloud = isCloud;
 };
+
+module.exports = Variable;