diff --git a/core/utils.js b/core/utils.js
index 617d5bfdc..a97e56a8c 100644
--- a/core/utils.js
+++ b/core/utils.js
@@ -1051,10 +1051,12 @@ Blockly.utils.userAgent = {};
   /**
    * Case-insensitive test of whether name is in the useragent string.
    * @param {string} name Name to test.
+   * @return {boolean} True if name is present.
    */
   function has(name) {
     return rawUpper.indexOf(name.toUpperCase()) != -1;
   }
+
   // Browsers.  Logic from:
   // https://github.com/google/closure-library/blob/master/closure/goog/labs/useragent/browser.js
   Blockly.utils.userAgent.IE = has('Trident') || has('MSIE');
@@ -1064,13 +1066,15 @@ Blockly.utils.userAgent = {};
   // Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.44
   //     (KHTML, like Gecko) JavaFX/8.0 Safari/537.44
   Blockly.utils.userAgent.JAVA_FX = has('JavaFX');
+
   // Engines.  Logic from:
   // https://github.com/google/closure-library/blob/master/closure/goog/labs/useragent/engine.js
   Blockly.utils.userAgent.WEBKIT = has('WebKit') &&
       !Blockly.utils.userAgent.EDGE;
   Blockly.utils.userAgent.GECKO = has('Gecko') &&
       !Blockly.utils.userAgent.IE && !Blockly.utils.userAgent.EDGE;
-  // Platform.  Logic from:
+
+  // Platforms.  Logic from:
   // https://github.com/google/closure-library/blob/master/closure/goog/labs/useragent/platform.js
   Blockly.utils.userAgent.ANDROID = has('Android');
   Blockly.utils.userAgent.IPAD = has('iPad');
@@ -1078,7 +1082,8 @@ Blockly.utils.userAgent = {};
   Blockly.utils.userAgent.IPHONE = has('iPhone') &&
       !Blockly.utils.userAgent.IPAD && !Blockly.utils.userAgent.IPOD;
   Blockly.utils.userAgent.MAC = has('Macintosh');
-  // Device.  Logic from:
+
+  // Devices.  Logic from:
   // https://github.com/google/closure-library/blob/master/closure/goog/labs/useragent/device.js
   Blockly.utils.userAgent.TABLET = Blockly.utils.userAgent.IPAD ||
       (Blockly.utils.userAgent.ANDROID && !has('Mobile')) || has('Silk');