[Fix] Format shape check

[MeowZheng]

as title

[codecov]

Codecov Report

Patch coverage: 54.54% and no project coverage change.

Comparison is base (45fae72) 83.46% compared to head (8dd524e) 83.47%.

❗ Current head 8dd524e differs from pull request most recent head f8ff2d5. Consider uploading reports for the commit f8ff2d5 to get more accurate results

Additional details and impacted files

@@           Coverage Diff            @@
##           dev-1.x    #2753   +/-   ##
========================================
  Coverage    83.46%   83.47%           
========================================
  Files          147      147           
  Lines         8669     8674    +5     
  Branches      1303     1304    +1     
========================================
+ Hits          7236     7241    +5     
  Misses        1203     1203           
  Partials       230      230           

Flag	Coverage Δ
unittests	83.47% <54.54%> (+<0.01%)	⬆️

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Impacted Files	Coverage Δ
mmseg/datasets/dataset_wrappers.py	49.18% <0.00%> (ø)
mmseg/datasets/transforms/transforms.py	90.53% <0.00%> (ø)
mmseg/datasets/transforms/formatting.py	90.90% <100.00%> (+1.16%)	⬆️

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