DOC: fix missing words and markup

tacaswell · jklymak · QuLogic · web-flow · commit 226201734b6a · 2021-02-17T22:57:18.000-05:00
Co-authored-by: Jody Klymak &lt;jklymak@gmail.com&gt;
Co-authored-by: Elliott Sales de Andrade &lt;quantum.analyst@gmail.com&gt;
diff --git a/doc/api/next_api_changes/behavior/18564-AL.rst b/doc/api/next_api_changes/behavior/18564-AL.rst
@@ -19,4 +19,7 @@ figure ::
   # add to Figure
   fig.add_axes(ax)
 
-as needs to be done for other `.axes.Axes` sub-classes.
+as needs to be done for other `.axes.Axes` sub-classes. Or, a 3-d 
+projection can be made via::
+
+    fig.add_subplot(projection='3d')
diff --git a/lib/mpl_toolkits/mplot3d/axes3d.py b/lib/mpl_toolkits/mplot3d/axes3d.py
@@ -64,7 +64,7 @@ def __init__(
             Other axes to share z-limits with.
         proj_type : {'persp', 'ortho'}
             The projection type, default 'persp'.
-        auto_add_to_figure : bool, default True
+        auto_add_to_figure : bool, default: True
             Prior to Matplotlib 3.4 Axes3D would add themselves
             to their host Figure on init.  Other Axes class do not
             do this.
