docs: display __init__() method docstrings

Display the class' __init__ methods' docstrings in the online
documentation. This helps users to understand the class APIs.

Remove the docstring from the _XYZPacket parent class, because Sphinx
was rendering that for every child class (AccelerometerPacket,
GyroPacket, MagnetometerPacket, QuaternionPacket). Apparently the
"autodoc_inherit_docstrings = False" setting does not work in that case.

Author: ktdreyer

adafruit_bluefruit_connect/_xyz_packet.py

@@ -44,9 +44,8 @@ class _XYZPacket(Packet):
     # _TYPE_HEADER is set by each concrete subclass.
 
     def __init__(self, x, y, z):
-        """Construct an _XYZPacket subclass object
-        from the given x, y, and z float values, and type character.
-        """
+        # Construct an _XYZPacket subclass object
+        # from the given x, y, and z float values, and type character.
         self._x = x
         self._y = y
         self._z = z

docs/conf.py

@@ -29,6 +29,8 @@
     "CircuitPython": ("https://circuitpython.readthedocs.io/en/latest/", None),
 }
 
+autoclass_content = "both"
+
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ["_templates"]