WIP nbsphinx

This uses the first commit of spatialaudio/nbsphinx#650, f963a2a3b7f31a844b31a3fca0fe653f37b500a2, in order to pass nbconvert options to nbsphinx.

Author: jasongrout

docs/source/conf.py

@@ -56,8 +56,13 @@
 """
 
 nbsphinx_execute = 'always'
-
-nbsphinx_execute_arguments = ['''--RegexRemovePreprocessor.patterns="['widget']" --RegexRemovePreprocessor.enabled=True''']
+nbsphinx_allow_errors = True
+nbsphinx_nbconvert_config = {
+                 'HighlightMagicsPreprocessor': {'enabled': True},
+                 # Work around https://github.com/jupyter/nbconvert/issues/720:
+                 #'RegexRemovePreprocessor': {'enabled': True, 'patterns': ['JUPYTERLITE']},
+                 'TagRemovePreprocessor': {'enabled': True, 'remove_cell_tags': ['jupyterlite']}
+}
 
 # -- General information -------