Moved GraphMaskExplainer to torch_geometric.explain

[fork123aniket]

As discussed in #7271 (reply in thread), have attached all the relevant code files to this PR that actually could aid in the final migration of GraphMaskExplainer from torch_geometric.contrib.explain to torch_geometric.explain.

[rusty1s]

Can we fix the diff here once again?

[codecov]

Codecov Report

Merging #7779 (385ab50) into master (d6951e7) will decrease coverage by 0.70%.
The diff coverage is 100.00%.

❗ Current head 385ab50 differs from pull request most recent head 2148f5d. Consider uploading reports for the commit 2148f5d to get more accurate results

@@            Coverage Diff             @@
##           master    #7779      +/-   ##
==========================================
- Coverage   90.12%   89.43%   -0.70%     
==========================================
  Files         458      456       -2     
  Lines       26874    26773     -101     
==========================================
- Hits        24221    23945     -276     
- Misses       2653     2828     +175     

Files Changed	Coverage Δ
...geometric/explain/algorithm/graphmask_explainer.py	96.26% <ø> (ø)
torch_geometric/contrib/explain/__init__.py	100.00% <100.00%> (ø)
torch_geometric/explain/algorithm/__init__.py	100.00% <100.00%> (ø)

... and 48 files with indirect coverage changes

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[fork123aniket]

I just added .gitattributes as done in #7759. Can you check if the Git Diff works as expected??

[rusty1s]

Mh, not really. It still shows full deletion/addition of the code. Let me see what I can do.

[fork123aniket]

Yeah, sure. Please let me know if I missed out on committing to this PR any imperative code file which causes this Git Diff issue.

[akihironitta]

The issue around the line endings should be resolved now.

Just curious, what text editor and version of git are you using? 👀

[akihironitta]

@fork123aniket Thank you for working on this. LGTM!

[fork123aniket]

@fork123aniket Thank you for working on this. LGTM!

Thanks, @akihironitta. Really appreciate your help here.

@rusty1s @akihironitta When can we expect to have this PR merged, given the changes associated with this PR have already been approved??

[rusty1s]

Thanks for taking care of merging.