GitLab

* upd

* upd

* better

* Deprecate multi-graph

* Handle heterograph and edge_ids

* lint

* Fix

* Remove multigraph in C++ end

* Fix lint

* Add some test and fix something

* Fix

* Fix

* upd

* Fix some test case

* Fix

* Fix
Co-authored-by: Ubuntu <ubuntu@ip-172-31-51-214.ec2.internal>
Co-authored-by: Jinjing Zhou <VoVAllen@users.noreply.github.com>
Co-authored-by: Minjie Wang <wmjlyjemaine@gmail.com>

* patched 1_first

* done 2_basics

* done 4_batch

* done 1_gcn, 9_gat, 2_capsule

* 4_rgcn.py

* revert

* more fix

* reorg tutorials and api docs

* fix

* update work with different backend section

* fix some warnings

* Update backend.rst

* Update index.rst
Co-authored-by: VoVAllen <VoVAllen@users.noreply.github.com>

* Edit for grammar and style

In the opening paragraph, it would be helpful to provide some overall scenario and the prerequisites you expect readers to have completed before they start here. "This tutorial assumes you have already..." Add a link to Install DGL topic perhaps and any other framework or IDE or even specialized knowledge. With this context, you help readers to succeed by setting expectations.

Better to group all tutorials (this, PageRank with, Batched Graph, Working with) at the same level in the left navigation rail and all as subsections of DGL Basics.

* Update tutorials/basics/2_basics.py

* minor spelling tweaks

* Update CONTRIBUTORS.md

* improve capsule tutorial with jinyang

* fix wrong layout of second-level tutorial

* delete transformer

* minor fix

* jake's change

* refactor API doc; add markup link in tutorials

* fix readme

[Doc] Basic tutorials & two model tutorials