Fixed a few spelling errors

[rotorliu]

Thanks for your contribution and we appreciate it a lot. The following instructions would make your pull request more healthy and more easily get feedback. If you do not understand some items, don't worry, just make the pull request and seek help from maintainers.

Motivation

Please describe the motivation of this PR and the goal you want to achieve through this PR.

Modification

Please briefly describe what modification is made in this PR.

BC-breaking (Optional)

Does the modification introduce changes that break the backward-compatibility of the downstream repos?
If so, please describe how it breaks the compatibility and how the downstream projects should modify their code to keep compatibility with this PR.

Use cases (Optional)

If this PR introduces a new feature, it is better to list some use cases here, and update the documentation.

Checklist

1. Pre-commit or other linting tools are used to fix the potential lint issues.
2. The modification is covered by complete unit tests. If not, please add more unit test to ensure the correctness.
3. If the modification has potential influence on downstream projects, this PR should be tested with downstream projects, like MMDet or MMDet3D.
4. The documentation has been modified accordingly, like docstring or example tutorials.

[CLAassistant]

All committers have signed the CLA.

[MeowZheng]

Thanks for your contribution, please sign CLA first

[codecov]

Codecov Report

Merging #1656 (a001ab7) into master (43b4efb) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #1656   +/-   ##
=======================================
  Coverage   90.23%   90.23%           
=======================================
  Files         142      142           
  Lines        8478     8478           
  Branches     1429     1429           
=======================================
  Hits         7650     7650           
  Misses        588      588           
  Partials      240      240           

Flag	Coverage Δ
unittests	90.23% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
mmseg/models/decode_heads/stdc_head.py	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 43b4efb...a001ab7. Read the comment docs.

[MengzhangLI]

Hi, thanks for your nice PR.

Could you please fix the lint error thus we could merge your PR?

Best,

[rotorliu]

Hi, thanks for your nice PR.

Could you please fix the lint error thus we could merge your PR?

Best,

OK, It's done.

[MengzhangLI]

Hi, thanks for your nice PR.
Could you please fix the lint error thus we could merge your PR?
Best,

OK, It's done.

Still not work.

Perhaps you should use pre-commit and try again. Thx!

[MengzhangLI]

Still has lint error, it is caused by your wrong pre-commit usage. In correct usage it would raise error above.

The reason is simple, L75-76 should be aligned, like:

        boundary_targets_pyramid = F.conv2d(boundary_targets_pyramids,
                                            self.fusion_kernel)

Rather than:

[MengzhangLI]

Sorry to bother you fixing this error. Thanks in advance! @rotorliu