Clean up addition signages

Author: okaiji

hexdex.html

@@ -111,8 +111,8 @@ <h1 data-i18n="hexdex-h1">Hexdex</h1>
             <img class="hex" src="/images/nodeschool-toronto.svg" alt="Toronto Hexagon">
           </a>
           <a class="imglink" href="https://github.com/nodeschool/hcmc-vietnam" title="Ho Chi Minh City - Vietnam">
-+            <img class="hex" src="images/nodeschool-hcmc-vietnam.svg" alt="Ho Chi Minh City - Vietnam Hexagon">
-+          </a>
+            <img class="hex" src="images/nodeschool-hcmc-vietnam.svg" alt="Ho Chi Minh City - Vietnam Hexagon">
+          </a>
           <img class="hex" src="/images/nodeschool-blank.png" alt="blank hexagon" aria-hidden="true">
       </div>
     </div>