Update contents.rst.inc

Fixes layout issue in subsection 1.2.1 with latex

Author: rubenroy

docs/contents.rst.inc

@@ -7,16 +7,10 @@ New to Python? Let's properly setup up your Python environment.
    :maxdepth: 2
 
    starting/which-python
-
-- Properly Install Python
-
- .. toctree::
-    :maxdepth: 1
-
-    starting/installation
-    starting/install/osx
-    starting/install/win
-    starting/install/linux
+   starting/installation
+   starting/install/osx
+   starting/install/win
+   starting/install/linux