fix errors

Author: Mariatta

getting_started.rst

@@ -23,19 +23,27 @@ All platforms with ``conda``
 * Create a new Python 3.5 environment (named ``aio35``, use a different
   if you like)::
 
+  .. highlight:: bash
+
        conda create -n aio35 python=3.5
 
 * Activate it.
   Linux and OS X::
 
+  .. highlight:: bash
+
        $ source activate aio35
 
   Windows::
 
+  .. highlight:: bash
+
        $ source activate aio35
 
 * Install ``aiohttp``::
 
+  .. highlight:: bash
+
        $(aio35) pip install aiohttp
 
 Platform specific