too many nitpicks

docs/source/conf.py

@@ -66,8 +66,6 b' extensions = ['
     'configtraits',
 ]
 
-nitpicky = True
-
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
 
@@ -235,7 +233,8 b" intersphinx_mapping = {'python': ('https://docs.python.org/3/', None),"
                        'ipykernel': ('https://ipykernel.readthedocs.io/en/latest/', None),
                        'prompt_toolkit' : ('https://python-prompt-toolkit.readthedocs.io/en/stable/', None),
                        'ipywidgets': ('https://ipywidgets.readthedocs.io/en/stable/', None),
-                       'ipyparallel': ('https://ipyparallel.readthedocs.io/en/stable/', None)
+                       'ipyparallel': ('https://ipyparallel.readthedocs.io/en/stable/', None),
+                       'pip': ('https://pip.pypa.io/en/stable/', None)
                       }
 
 # Options for LaTeX output