Ruby syntax highlight end chars

Author: nyjt

README.md

@@ -76,6 +76,7 @@ or Extendable GUI:
 
 ```ruby
 //= require expandable_tree/initializer
+```
 
 #### Stylesheets
 
@@ -316,4 +317,4 @@ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-W
+W