Fix sprite sidebar 1878 (#2005)

* fixed the header levels in the sprite doc
changed doc subsection header
renamed old subsection

* Revert "fixed the header levels in the sprite doc"

This reverts commit e2c8b46.

* Revert "Revert "fixed the header levels in the sprite doc""

This reverts commit c2dcc0f.

.python-version

@@ -0,0 +1 @@
+arcade-dev

doc/programming_guide/sprites/spritelists.rst

@@ -1,7 +1,10 @@
 .. _pg_spritelists:
 
+Drawing with Sprites and SpriteLists
+------------------------------------
+
 What's a Sprite?
-----------------
+^^^^^^^^^^^^^^^^
 
 Each sprite describes where a game object is & how to draw it. This includes:
 
@@ -16,12 +19,12 @@ sprites to the screen.
 .. _pg_spritelists_why:
 
 Why SpriteLists?
-----------------
+^^^^^^^^^^^^^^^^
 
 .. _pg_spritelists_why_hardware:
 
 They're How Hardware Works
-^^^^^^^^^^^^^^^^^^^^^^^^^^
+""""""""""""""""""""""""""
 
 Graphics hardware is designed to draw groups of objects at the same time.
 These groups are called **batches**.
@@ -38,7 +41,7 @@ should avoid trying to draw sprites one at a time.
 .. _pg_spritelists_why_faster_dev:
 
 They Help Develop Games Faster
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+""""""""""""""""""""""""""""""
 
 Sprite lists do more than just draw. They also have built-in features which save
 you time & effort, including:
@@ -50,8 +53,8 @@ you time & effort, including:
 
 .. _pg_spritelists_minimal_sprite_drawing:
 
-Drawing with Sprites and SpriteLists
-------------------------------------
+Using Sprites and SpriteLists
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 Let's get to the example code.