is_undirected without coalesce

[rusty1s]

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[codecov-commenter]

Codecov Report

Merging #3789 (7014c50) into master (1a5e65c) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3789      +/-   ##
==========================================
- Coverage   81.96%   81.93%   -0.03%     
==========================================
  Files         299      299              
  Lines       15153    15126      -27     
==========================================
- Hits        12420    12394      -26     
+ Misses       2733     2732       -1     

Impacted Files	Coverage Δ
torch_geometric/utils/undirected.py	91.66% <100.00%> (ø)
torch_geometric/data/temporal.py	28.57% <0.00%> (-2.68%)	⬇️
...orch_geometric/graphgym/contrib/train/benchmark.py	20.00% <0.00%> (-1.32%)	⬇️
torch_geometric/graphgym/optim.py	92.85% <0.00%> (-0.33%)	⬇️
torch_geometric/transforms/gdc.py	78.75% <0.00%> (-0.22%)	⬇️
torch_geometric/graphgym/models/layer.py	72.97% <0.00%> (-0.15%)	⬇️
torch_geometric/nn/dense/linear.py	93.93% <0.00%> (-0.07%)	⬇️
torch_geometric/data/storage.py	81.22% <0.00%> (-0.07%)	⬇️
torch_geometric/loader/graph_saint.py	97.97% <0.00%> (-0.05%)	⬇️
torch_geometric/nn/conv/rgcn_conv.py	98.51% <0.00%> (-0.03%)	⬇️
... and 9 more

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