Fix a few issues with the rst files

docs/gettingstarted.rst

@@ -13,6 +13,7 @@ and more.
 .. _here: https://gitlab.ida.liu.se/starcraft-api/sc2-python-bot
 
 .. code-block:: python
+
    import os
 
    from library import *

docs/perception.rst

@@ -6,7 +6,7 @@ state and the input from Starcraft. All these classes are taken more or less
 directly from the original `CommandCenter`_, but we have left all
 decision-making to the user of the API.
 
--.. _CommandCenter: https://github.com/davechurchill/commandcenter
+.. _CommandCenter: https://github.com/davechurchill/commandcenter
 
 Here is a full list of all managers: