[CI] Small fixes to increase test logs readability

[barry-jin]

Description

As title.

Checklist

Essentials

• [x] PR's title starts with a category (e.g. [BUGFIX], [MODEL], [TUTORIAL], [FEATURE], [DOC], etc)
• [x] Changes are complete (i.e. I finished coding on this PR)
• [x] 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

cc @dmlc/gluon-nlp-team

[codecov[bot]]

Codecov Report

Merging #1398 into master will decrease coverage by 0.04%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1398      +/-   ##
==========================================
- Coverage   85.31%   85.27%   -0.05%     
==========================================
  Files          53       53              
  Lines        6959     6959              
==========================================
- Hits         5937     5934       -3     
- Misses       1022     1025       +3     

Impacted Files	Coverage Δ
src/gluonnlp/data/filtering.py	78.26% <0.00%> (-4.35%)	:arrow_down:
src/gluonnlp/data/tokenizers/yttm.py	81.89% <0.00%> (-0.87%)	:arrow_down:
src/gluonnlp/attention_cell.py	80.70% <0.00%> (+0.78%)	:arrow_up:
src/gluonnlp/data/tokenizers/subword_nmt.py	79.43% <0.00%> (+0.93%)	:arrow_up:

---

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 46c9d01...87fed7e. Read the comment docs.

[github-actions[bot]]

The documentation website for preview: http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR1398/small-fix/index.html

[github-actions[bot]]

The documentation website for preview: http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR1398/small-fix/index.html