Rename _nextElement to solve Issue#629 (mozilla#637)

* Renamed _nextElement to _nextNode

* Update docs to reflect changes made

Readability.js

@@ -548,11 +548,11 @@ Readability.prototype = {
   },
 
   /**
-   * Finds the next element, starting from the given node, and ignoring
+   * Finds the next node, starting from the given node, and ignoring
    * whitespace in between. If the given node is an element, the same node is
    * returned.
    */
-  _nextElement: function (node) {
+  _nextNode: function (node) {
     var next = node;
     while (next
         && (next.nodeType != this.ELEMENT_NODE)
@@ -577,10 +577,10 @@ Readability.prototype = {
       // <p> block.
       var replaced = false;
 
-      // If we find a <br> chain, remove the <br>s until we hit another element
+      // If we find a <br> chain, remove the <br>s until we hit another node
       // or non-whitespace. This leaves behind the first <br> in the chain
       // (which will be replaced with a <p> later).
-      while ((next = this._nextElement(next)) && (next.tagName == "BR")) {
+      while ((next = this._nextNode(next)) && (next.tagName == "BR")) {
         replaced = true;
         var brSibling = next.nextSibling;
         next.parentNode.removeChild(next);
@@ -598,7 +598,7 @@ Readability.prototype = {
         while (next) {
           // If we've hit another <br><br>, we're done adding children to this <p>.
           if (next.tagName == "BR") {
-            var nextElem = this._nextElement(next.nextSibling);
+            var nextElem = this._nextNode(next.nextSibling);
             if (nextElem && nextElem.tagName == "BR")
               break;
           }
@@ -736,7 +736,7 @@ Readability.prototype = {
     });
 
     this._forEachNode(this._getAllNodesWithTag(articleContent, ["br"]), function(br) {
-      var next = this._nextElement(br.nextSibling);
+      var next = this._nextNode(br.nextSibling);
       if (next && next.tagName == "P")
         br.parentNode.removeChild(br);
     });