[real-world uses] Fixed link to GWT wrapper extension

Author: stockiNail

doc/realworld.html

@@ -52,7 +52,7 @@ <h2>CodeMirror real-world uses</h2>
       <li><a href="http://code.google.com/p/codemirror2-gwt/">CodeMirror2-GWT</a> (Google Web Toolkit wrapper)</li>
       <li><a href="http://www.crunchzilla.com/code-monster">Code Monster</a> & <a href="http://www.crunchzilla.com/code-maven">Code Maven</a> (learning environment)</li>
       <li><a href="http://codepen.io">Codepen</a> (gallery of animations)</li>
-      <li><a href="https://github.com/pepstock-org/Coderba"Coderba</a> Google Web Toolkit (GWT) wrapper</li>
+      <li><a href="https://github.com/pepstock-org/Coderba">Coderba</a> Google Web Toolkit (GWT) wrapper</li>
       <li><a href="https://coderpad.io/">Coderpad</a> (interviewing tool)</li>
       <li><a href="http://sasstwo.codeschool.com/levels/1/challenges/1">Code School</a> (online tech learning environment)</li>
       <li><a href="http://code-snippets.bungeshea.com/">Code Snippets</a> (WordPress snippet management plugin)</li>