Fixed formatting of the code block

README.md

@@ -38,10 +38,12 @@ You have three options for installing PASTA.
   * In some cases, your python installation might be in a location different from
   where PASTA is hoping to find it. In these caes, you get the following error
     message: 
-```PASTA has encoutered a fatal error, and will now terminate.
-    A Python runtime could not be located. 
+    ```
+    PASTA has encoutered a fatal error, and will now terminate.
+    A Python runtime could not be located.
     You may need to install a framework build of Python,
-    or edit the PyRuntimeLocations array in this application's info.plist file.```. 
+    or edit the PyRuntimeLocations array in this application's info.plist file.
+    ```
     If you get this message, make sure you have python 2.7 installed. Then, run
     `python -c 'import sys; print sys.prefix'`. This will tell you where your python
     is located. Now click on the PASTA app and select `Show Package Content`.