Merge pull request #263 from adamjstewart/docs/intersphinx

Docs: update intersphinx_mapping to modern style

docs/source/conf.py

@@ -219,7 +219,7 @@
 pdf_fit_mode = "overflow"
 
 # Example configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {"http://docs.python.org/": None}
+intersphinx_mapping = {"python": ("http://docs.python.org/3", None)}
 
 
 # -- Extension configuration -------------------------------------------------