Adopt strict mode throughout the codebase

lib/jasmine-core/jasmine-html.js

@@ -34,6 +34,8 @@ jasmineRequire.html = function(j$) {
 };
 
 jasmineRequire.HtmlReporter = function(j$) {
+  'use strict';
+
   function ResultsStateBuilder() {
     this.topResults = new j$.private.ResultsNode({}, '', null);
     this.currentParent = this.topResults;
@@ -907,6 +909,8 @@ jasmineRequire.HtmlReporter = function(j$) {
 };
 
 jasmineRequire.HtmlSpecFilter = function() {
+  'use strict';
+
   /**
    * @name HtmlSpecFilter
    * @classdesc Legacy HTML spec filter, for backward compatibility
@@ -946,6 +950,8 @@ jasmineRequire.HtmlSpecFilter = function() {
 };
 
 jasmineRequire.ResultsNode = function() {
+  'use strict';
+
   function ResultsNode(result, type, parent) {
     this.result = result;
     this.type = type;
@@ -970,6 +976,8 @@ jasmineRequire.ResultsNode = function() {
 };
 
 jasmineRequire.QueryString = function() {
+  'use strict';
+
   /**
    * Reads and manipulates the query string.
    * @since 2.0.0
@@ -1054,6 +1062,8 @@ jasmineRequire.QueryString = function() {
 };
 
 jasmineRequire.HtmlExactSpecFilter = function() {
+  'use strict';
+
   /**
    * Spec filter for use with {@link HtmlReporter}
    *