Change format for Sphinx

Author: florianfesti

boxes/__init__.py

@@ -2443,12 +2443,13 @@ def rectangularWall(self, x, y, edges="eeee",
         on both sides and both parts need to use same edge or at least an
         edge with the same width.
 
-        ::
-             4--3
-            5    2
-            |    |
-            6    1
-             7--0
+::
+
+         4--3
+        5    2
+        |    |
+        6    1
+         7--0
 
         e.g. if four rectangularWalls use "s" edges on the bottom, the side
         edges can be extended to the bottom with [1, 6].