MDL-56010 libraries: remove jshint changes and update comment block

lib/amd/src/loglevel.js

@@ -25,12 +25,13 @@
 // Description of import into Moodle:
 // Download from https://github.com/pimterry/loglevel/releases
 // Copy loglevel.js into lib/amd/src/ in Moodle folder.
-// Add the license as a comment to the file and these instructions.
-// Add the jshint ignore:start and ignore:end comments.
-// Delete the jshint validthis:true comments.
 
-/* jshint ignore:start */
-/*! loglevel - v1.4.1 - https://github.com/pimterry/loglevel - (c) 2013 Tim Perry - licensed MIT */
+/*
+ * loglevel - https://github.com/pimterry/loglevel
+ *
+ * Copyright (c) 2013 Tim Perry
+ * Licensed under the MIT license.
+ */
 (function (root, definition) {
     "use strict";
     if (typeof define === 'function' && define.amd) {
@@ -92,6 +93,7 @@
     }
 
     function replaceLoggingMethods(level, loggerName) {
+        /*jshint validthis:true */
         for (var i = 0; i < logMethods.length; i++) {
             var methodName = logMethods[i];
             this[methodName] = (i < level) ?
@@ -103,6 +105,7 @@
     // By default, we use closely bound real methods wherever possible, and
     // otherwise we wait for a console to appear, and then try again.
     function defaultMethodFactory(methodName, level, loggerName) {
+        /*jshint validthis:true */
         return realMethod(methodName) ||
             enableLoggingWhenConsoleArrives.apply(this, arguments);
     }
@@ -255,5 +258,4 @@
     };
 
     return defaultLogger;
-}));
-/* jshint ignore:end */
+}));