Improve documentation formatting

doc/development/goals.rst

@@ -19,7 +19,7 @@ Feature goals
 
 * One pretix software installation has to cope with multiple events by multiple organizers
 * There is no code access necessary to create a new event
-*Tixe is abstract in many ways to adopt to as much events as possible.
+* Pretix is abstract in many ways to adopt to as much events as possible.
 
     * Tickets are only an instance of an abstract model called items, such that the system can also sell e.g. merchandise
     * An abstract concept of restriction is used to restrict the selling of tickets, for example by date, by number or by user permissions.

doc/development/structure.rst

@@ -24,12 +24,18 @@ pretix/
         Django or installed 3rd-party packages, like a filter to combine the ``lessc``
         preprocessor with ``django-compressor``'s URL rewriting.
 
+tests/
+    This is the root directory for all test codes. It includes subdirectories ``base``,
+    ``control``, ``presale``, ``helpers`` and ``plugins`` to mirror the structure of the
+    ``pretix`` source code as well as ``testdummy``, which is a pretix plugin used during
+    testing.
+
 Language files
 --------------
 The language files live in ``locale/*/LC_MESSAGES/``.
 
 Static files
--------------
+------------
 
 LESS source code
 ^^^^^^^^^^^^^^^^