* Fixes #3955 (boundary_expansion docs)

* add to docs for steiner_tree

* Add missing functions to docs. Thanks to #4111

* Doc fixups

* Put filters onto the doc pages.

* Add @jamestrimble doc compare script to repo and expand

* Fix latex syntax in docs for trophic

* more latex corrections

* deprecate edge_betweeness and betweeness_centrality_source.

warnings and add to list of deprecations

* Use docs to identify hopcrfot_karo_matching and maximum_matching

* remove  underscore from _naive_greedy_modularity_communities

* cite James Trimble for code that finds missing functions

* Update parallel_betweenness example to avoid deprecated function

betweenness_centrality_source should be replaced by
betweenness_centrality_subset in plot_parallel_betweenness.

find _naive_greedy and change name

* tweak

* Initial commit.

* Fixed PEP 8 issues.

* Fixed more PEP 8 issues.

* Added type to sepset-nodes.

* Moved file to networkx/algorithms/tree, changed name of module to avoid namespace collision, added entry to doc system, changed deepcopy to list, removed check for None, shifted to G.is_directed(), added example.

* Removed example code.

* Removed unused import statement.

* Moved notes section.

* Fixed PEP 8 issues and removed old file.

* Fixed PEP 8 issues.

* Formatting with Black, added docstring to example and removed license information.

* Added name to name of contributors.

* Ran black

i.e.,
black networkx/algorithms/tree/tests/test_junction_tree_algorithm.py

* Updated explanation of junction trees, removed 'Graph' from unsupported classes.

* DOC: tweaks to docstring.

* Changed naming and updated docstring/code according to suggestions.

* Removed old files.

* Updated doc and init.

* Minor tweaks in docs and import structure

* Improve example

Co-authored-by: Jarrod Millman <jarrod.millman@gmail.com>
Co-authored-by: Ross Barnowski <rossbar@berkeley.edu>
Co-authored-by: Dan Schult <dschult@colgate.edu>

* Implemented multipartite_layout

* Added test.

* Remove left over `max_layer` in multipartite_layout

* Multipartite Layout Example

* Update examples/drawing/plot_multipartite_graph.py

Co-authored-by: Jarrod Millman <jarrod.millman@gmail.com>

* Handle kwds explicitly in draw_networkx; fix kwds in examples

* fix PEP8 issues

Fixes #4020 

* Fix exception causes and messages in 12 modules

* Remove deprecated matplotlib.use(warn=False) that was default anyway.

Co-authored-by: Dan Schult <dschult@colgate.edu>

$ find examples -name \*.py -exec pyupgrade --py36-plus {} \;