FIX: only highlight exact word matches in results

- also fixes phrase highlighting

app/assets/javascripts/discourse/components/highlight-text.js.es6

@@ -1,13 +1,11 @@
+import highlightText from 'discourse/lib/highlight-text';
+
 export default Ember.Component.extend({
   tagName: 'span',
 
   _highlightOnInsert: function() {
     const term = this.get('highlight');
-    const self = this;
-
-    if(!_.isEmpty(term)) {
-      self.$().highlight(term.split(/\s+/), {className: 'search-highlight'});
-    }
+    highlightText(this.$(), term);
   }.observes('highlight').on('didInsertElement')
 
 });

app/assets/javascripts/discourse/lib/highlight-text.js.es6

@@ -0,0 +1,8 @@
+export default function($elem, term) {
+  if(!_.isEmpty(term)) {
+    // special case ignore "l" which is used for magic sorting
+    let words = _.reject(term.match(/"[^"]+"|[^\s]+/g), t => t === 'l');
+    words = words.map(w => w.replace(/^"(.*)"$/, "$1"));
+    $elem.highlight(words, {className: 'search-highlight', wordsOnly: true});
+  }
+}

app/assets/javascripts/discourse/widgets/search-menu-results.js.es6

@@ -4,6 +4,7 @@ import RawHtml from 'discourse/widgets/raw-html';
 import { createWidget } from 'discourse/widgets/widget';
 import { h } from 'virtual-dom';
 import { iconNode } from 'discourse/helpers/fa-icon-node';
+import highlightText from 'discourse/lib/highlight-text';
 
 class Highlighted extends RawHtml {
   constructor(html, term) {
@@ -12,11 +13,7 @@ class Highlighted extends RawHtml {
   }
 
   decorate($html) {
-    if (this.term) {
-      // special case ignore "l" which is used for magic sorting
-      const words = _.reject(this.term.split(/\s+/), t => t === 'l');
-      $html.highlight(words, { className: 'search-highlight' });
-    }
+    highlightText($html, this.term);
   }
 }