Avoid global flag when looking for metadata using regexes

Readability.js

@@ -1200,10 +1200,10 @@ Readability.prototype = {
 
     // Match "description", or Twitter's "twitter:description" (Cards)
     // in name attribute.
-    var namePattern = /^\s*((twitter)\s*:\s*)?(description|title)\s*$/gi;
+    var namePattern = /^\s*((twitter)\s*:\s*)?(description|title)\s*$/i;
 
     // Match Facebook's Open Graph title & description properties.
-    var propertyPattern = /^\s*og\s*:\s*(description|title)\s*$/gi;
+    var propertyPattern = /^\s*og\s*:\s*(description|title)\s*$/i;
 
     // Find description tags.
     this._forEachNode(metaElements, function(element) {

test/test-pages/blogger/expected-metadata.json

@@ -2,6 +2,6 @@
   "title": "Open Verilog flow for Silego GreenPak4 programmable logic devices",
   "byline": null,
   "dir": "ltr",
-  "excerpt": "I've written a couple of posts in the past few months but they were all for the blog at work so I figured I'm long overdue for one on Silicon Exposed.",
+  "excerpt": "I've written a couple of posts in the past few months but they were all for the blog at work  so I figured I'm long overdue for one on Silic...",
   "readerable": true
 }

test/test-pages/la-nacion/expected-metadata.json

@@ -1,6 +1,6 @@
 {
   "title": "Una solución no violenta para la cuestión mapuche - 07.12.2017",
   "byline": null,
-  "excerpt": "Los pueblos indígenas reclaman por derechos que permanecen\n                incumplidos, por eso es más eficiente canalizar la protesta que reprimirla",
+  "excerpt": "Una solución no violenta para la cuestión mapuche | Los pueblos indígenas reclaman por derechos que permanecen incumplidos, por eso es más eficiente canalizar la protesta que reprimirla - LA NACION",
   "readerable": true
 }

test/test-pages/links-in-tables/expected-metadata.json

@@ -2,6 +2,6 @@
   "title": "Saving Data: Reducing the size of App Updates by 65%",
   "byline": null,
   "dir": "ltr",
-  "excerpt": "Posted by Andrew Hayden, Software Engineer on Google Play",
+  "excerpt": "Posted by Andrew Hayden, Software Engineer on Google Play    Android users are downloading tens of billions of apps and games on Google Pla...",
   "readerable": true
 }

test/test-pages/mozilla-2/expected-metadata.json

@@ -2,6 +2,6 @@
   "title": "Welcome to Firefox Developer Edition",
   "byline": null,
   "dir": "ltr",
-  "excerpt": "Get to know the features that make it the most complete browser for building the Web.",
+  "excerpt": "Built for those who build the Web. Introducing the only browser made for developers.",
   "readerable": false
 }