Fixing review comments

core/block.js

@@ -218,9 +218,10 @@ Blockly.Block.prototype.data = null;
 
 /**
  * Colour of the block as HSV hue value (0-360)
+ * This may be null if the block colour was not set via a hue number.
  * @type {?number}
  * @private
-  */
+ */
 Blockly.Block.prototype.hue_ = null;
 
 /**
@@ -930,7 +931,8 @@ Blockly.Block.prototype.setColour = function(colour) {
 Blockly.Block.prototype.setStyle = function(blockStyleName) {
   var style = Blockly.getStyle();
   if (!style) {
-    throw Error('Trying to set block style before Blockly.setStyle() has been called');
+    throw Error('Trying to set block style to ' + blockStyleName +
+      ' before style was defined via Blockly.setStyle().');
   }
   var blockStyle = style.getBlockStyle(blockStyleName);
   this.styleName_ = blockStyleName;

style/classic.js

@@ -21,7 +21,6 @@
 /**
  * @fileoverview Classic style.
  * Contains multi colored border to create shadow effect.
- * @author aschmiedt@google.com (Abby Schmiedt)
  */
 
 'use strict';

style/highcontrast.js

@@ -21,7 +21,6 @@
 /**
  * @fileoverview High contrast style.
  * Darker colors to contrast the white block font.
- * @author aschmiedt@google.com (Abby Schmiedt)
  */
 'use strict';
 

style/modern.js

@@ -21,7 +21,6 @@
 /**
  * @fileoverview Modern style.
  * Same colors as classic, but single colored border.
- * @author aschmiedt@google.com (Abby Schmiedt)
  */
 'use strict';
 

style/style_script/create_styles.py

@@ -1,4 +1,4 @@
-# !/usr/bin/python2.7
+# !/usr/bin/env python
 # Converts a single colour to primary, secondary and tertiary colours.
 # Primary Colour - The colour given
 # Secondary Colour - Lightens the primary colour by .8

style/style_script/styles_example.json

@@ -1,23 +1,3 @@
-/**
- * @license
- * Visual Blocks Editor
- *
- * Copyright 2018 Google Inc.
- * https://developers.google.com/blockly/
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 {
   "colour":"#A5745B",
   "lists":"260",

tests/multi_playground.html

@@ -57,7 +57,6 @@ function start() {
 
   startBlocklyInstance('HorizontalEndLTR', false, true, 'end', toolbox);
   startBlocklyInstance('HorizontalEndRTL', true, true, 'end', toolbox);
-  Blockly.setStyle(Blockly.Styles.Classic);
 }
 
 function startBlocklyInstance(suffix, rtl, horizontalLayout, position,