make EOF newlines consistent

Author: phlipper

chapters/regular_expressions/replacing-html-tags-with-html-named-entities.md

@@ -22,4 +22,4 @@ htmlEncode('<a href="http://bn.com">Barnes & Noble</a>')
 
 ## Discussion
 
-There are probably better ways to implement the above method.
+There are probably better ways to implement the above method.

chapters/strings/lowercasing-a-string.md

@@ -42,4 +42,4 @@ String.prototype.downcase = function() {
   return this.toLowerCase();
 };
 "ONE TWO THREE".downcase();
-{% endhighlight %}
+{% endhighlight %}

chapters/strings/trimming-whitespace-from-a-string.md

@@ -63,4 +63,3 @@ String::rstrip = -> @replace /\s+$/g, ""
 {% endhighlight %}
 
 For an interesting discussion and benchmarks of JavaScript `trim` performance, see [this blog post](http://blog.stevenlevithan.com/archives/faster-trim-javascript) by Steve Levithan.
-

chapters/strings/uppercasing-a-string.md

@@ -42,4 +42,4 @@ String.prototype.upcase = function() {
   return this.toUpperCase();
 };
 "one two three".upcase();
-{% endhighlight %}
+{% endhighlight %}