diff --git a/core/events/events_block_base.js b/core/events/events_block_base.js
index 76fa09c97..1f22a4ed8 100644
--- a/core/events/events_block_base.js
+++ b/core/events/events_block_base.js
@@ -42,8 +42,7 @@ const BlockBase = function(opt_block) {
    */
   this.workspaceId = this.isBlank ? '' : opt_block.workspace.id;
 };
-object.inherits(BlockBase,
-    Abstract);
+object.inherits(BlockBase, Abstract);
 
 /**
  * Encode the event as JSON.
diff --git a/core/events/events_block_change.js b/core/events/events_block_change.js
index 5e12919c0..38d8b5c67 100644
--- a/core/events/events_block_change.js
+++ b/core/events/events_block_change.js
@@ -32,8 +32,8 @@ const registry = goog.require('Blockly.registry');
  * @extends {Events.BlockBase}
  * @constructor
  */
-const BlockChange = function(opt_block, opt_element, opt_name, opt_oldValue,
-    opt_newValue) {
+const BlockChange = function(
+    opt_block, opt_element, opt_name, opt_oldValue, opt_newValue) {
   BlockChange.superClass_.constructor.call(this, opt_block);
   if (!opt_block) {
     return;  // Blank event to be populated by fromJson.
@@ -94,7 +94,7 @@ BlockChange.prototype.run = function(forward) {
   const workspace = this.getEventWorkspace_();
   const block = workspace.getBlockById(this.blockId);
   if (!block) {
-    console.warn("Can't change non-existent block: " + this.blockId);
+    console.warn('Can\'t change non-existent block: ' + this.blockId);
     return;
   }
   if (block.mutator) {
@@ -108,7 +108,7 @@ BlockChange.prototype.run = function(forward) {
       if (field) {
         field.setValue(value);
       } else {
-        console.warn("Can't set non-existent field: " + this.name);
+        console.warn('Can\'t set non-existent field: ' + this.name);
       }
       break;
     }
@@ -132,11 +132,10 @@ BlockChange.prototype.run = function(forward) {
       }
       if (block.domToMutation) {
         const dom = Xml.textToDom(/** @type {string} */
-            (value) || '<mutation/>');
+                                  (value) || '<mutation/>');
         block.domToMutation(dom);
       }
-      Events.fire(new BlockChange(
-          block, 'mutation', null, oldMutation, value));
+      Events.fire(new BlockChange(block, 'mutation', null, oldMutation, value));
       break;
     }
     default:
@@ -144,7 +143,6 @@ BlockChange.prototype.run = function(forward) {
   }
 };
 
-registry.register(registry.Type.EVENT, Events.CHANGE,
-    BlockChange);
+registry.register(registry.Type.EVENT, Events.CHANGE, BlockChange);
 
 exports = BlockChange;
diff --git a/core/events/events_block_create.js b/core/events/events_block_create.js
index 460afc2c1..e3531dabe 100644
--- a/core/events/events_block_create.js
+++ b/core/events/events_block_create.js
@@ -100,13 +100,12 @@ BlockCreate.prototype.run = function(forward) {
         block.dispose(false);
       } else if (id == this.blockId) {
         // Only complain about root-level block.
-        console.warn("Can't uncreate non-existent block: " + id);
+        console.warn('Can\'t uncreate non-existent block: ' + id);
       }
     }
   }
 };
 
-registry.register(registry.Type.EVENT, Events.CREATE,
-    BlockCreate);
+registry.register(registry.Type.EVENT, Events.CREATE, BlockCreate);
 
 exports = BlockCreate;
diff --git a/core/events/events_block_delete.js b/core/events/events_block_delete.js
index f2bf510e7..57275b31a 100644
--- a/core/events/events_block_delete.js
+++ b/core/events/events_block_delete.js
@@ -99,7 +99,7 @@ BlockDelete.prototype.run = function(forward) {
         block.dispose(false);
       } else if (id == this.blockId) {
         // Only complain about root-level block.
-        console.warn("Can't delete non-existent block: " + id);
+        console.warn('Can\'t delete non-existent block: ' + id);
       }
     }
   } else {
@@ -109,7 +109,6 @@ BlockDelete.prototype.run = function(forward) {
   }
 };
 
-registry.register(registry.Type.EVENT, Events.DELETE,
-    BlockDelete);
+registry.register(registry.Type.EVENT, Events.DELETE, BlockDelete);
 
 exports = BlockDelete;
diff --git a/core/events/events_block_move.js b/core/events/events_block_move.js
index 766d72f96..8ab5c5367 100644
--- a/core/events/events_block_move.js
+++ b/core/events/events_block_move.js
@@ -85,8 +85,7 @@ BlockMove.prototype.fromJson = function(json) {
   this.newInputName = json['newInputName'];
   if (json['newCoordinate']) {
     const xy = json['newCoordinate'].split(',');
-    this.newCoordinate =
-        new Coordinate(Number(xy[0]), Number(xy[1]));
+    this.newCoordinate = new Coordinate(Number(xy[0]), Number(xy[1]));
   }
   if (json['recordUndo'] !== undefined) {
     this.recordUndo = json['recordUndo'];
@@ -144,7 +143,7 @@ BlockMove.prototype.run = function(forward) {
   const workspace = this.getEventWorkspace_();
   const block = workspace.getBlockById(this.blockId);
   if (!block) {
-    console.warn("Can't move non-existent block: " + this.blockId);
+    console.warn('Can\'t move non-existent block: ' + this.blockId);
     return;
   }
   const parentId = forward ? this.newParentId : this.oldParentId;
@@ -154,7 +153,7 @@ BlockMove.prototype.run = function(forward) {
   if (parentId) {
     parentBlock = workspace.getBlockById(parentId);
     if (!parentBlock) {
-      console.warn("Can't connect to non-existent block: " + parentId);
+      console.warn('Can\'t connect to non-existent block: ' + parentId);
       return;
     }
   }
@@ -179,12 +178,11 @@ BlockMove.prototype.run = function(forward) {
     if (parentConnection) {
       blockConnection.connect(parentConnection);
     } else {
-      console.warn("Can't connect to non-existent input: " + inputName);
+      console.warn('Can\'t connect to non-existent input: ' + inputName);
     }
   }
 };
 
-registry.register(registry.Type.EVENT, Events.MOVE,
-    BlockMove);
+registry.register(registry.Type.EVENT, Events.MOVE, BlockMove);
 
 exports = BlockMove;