[DOC] fix math formula in docs

[liusy182]

Description

Fix the math formula in docs for gluonnlp.model.LSTMPCellWithClip. There is an extra } that caused formula not displaying as expected. Attached with documentation website screenshot to show the problem.

Checklist

Essentials

• PR's title starts with a category (e.g. [BUGFIX], [MODEL], [TUTORIAL], [FEATURE], [DOC], etc)
• Changes are complete (i.e. I finished coding on this PR)
• All changes have test coverage
• Code is well-documented

Changes

• Feature1, tests, (and when applicable, API doc)
• Feature2, tests, (and when applicable, API doc)

Comments

• If this change is a backward incompatible change, why must this change be made.
• Interesting edge cases to note here

[codecov]

Codecov Report

❗ No coverage uploaded for pull request head (fix-latex@31f9341). Click here to learn what that means.
The diff coverage is n/a.

[codecov]

Codecov Report

Merging #920 into master will decrease coverage by 1.15%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #920      +/-   ##
==========================================
- Coverage   89.71%   88.55%   -1.16%     
==========================================
  Files          66       66              
  Lines        6405     6405              
==========================================
- Hits         5746     5672      -74     
- Misses        659      733      +74

Impacted Files	Coverage Δ
src/gluonnlp/model/lstmpcellwithclip.py	100% <ø> (ø)	⬆️
src/gluonnlp/data/batchify/embedding.py	46.87% <0%> (-50.79%)	⬇️
src/gluonnlp/vocab/subwords.py	59.43% <0%> (-21.7%)	⬇️
src/gluonnlp/model/parameter.py	92% <0%> (-8%)	⬇️
src/gluonnlp/data/corpora/wikitext.py	94.82% <0%> (-5.18%)	⬇️
src/gluonnlp/data/transforms.py	77.13% <0%> (-4.58%)	⬇️
src/gluonnlp/data/batchify/batchify.py	93.18% <0%> (-3.41%)	⬇️
src/gluonnlp/data/dataset.py	97.61% <0%> (-1.59%)	⬇️
src/gluonnlp/data/word_embedding_evaluation.py	96.21% <0%> (-0.76%)	⬇️
src/gluonnlp/model/sequence_sampler.py	91.69% <0%> (+16.95%)	⬆️

[mli]

Job PR-920/1 is complete.
Docs are uploaded to http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-920/1/index.html

[szha]

@liusy182 thank you for spotting it! looks like it needs a bit more fixing http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-920/1/api/modules/model.html?highlight=lstmpcellwithclip#gluonnlp.model.LSTMPCellWithClip

[mli]

Job PR-920/2 is complete.
Docs are uploaded to http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-920/2/index.html

[mli]

Job PR-920/3 is complete.
Docs are uploaded to http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-920/3/index.html

[liusy182]

@szha thanks. Fixed with the new commit: link

[leezu]

Great, thank you!

[mli]

Job PR-920/4 is complete.
Docs are uploaded to http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-920/4/index.html

[szha]

@liusy182 merged. Thank you for the fix!