polish(rjy): polish comments in wqmix/ngu/pg model

[nighood]

Description

Related Issue

TODO

Check List

• [ ] merge the latest version source branch/repo, and resolve all the conflicts
• [ ] pass style check
• [ ] pass all the tests

[codecov[bot]]

Codecov Report

Merging #739 (a9981fa) into main (817b215) will increase coverage by 0.13%. Report is 5 commits behind head on main. The diff coverage is n/a.

:exclamation: Current head a9981fa differs from pull request most recent head c385311. Consider uploading reports for the commit c385311 to get more accurate results

@@            Coverage Diff             @@
##             main     #739      +/-   ##
==========================================
+ Coverage   77.95%   78.09%   +0.13%     
==========================================
  Files         665      665              
  Lines       52179    52177       -2     
==========================================
+ Hits        40675    40746      +71     
+ Misses      11504    11431      -73     

Flag	Coverage Δ
unittests	78.09% <ø> (+0.13%)	:arrow_up:

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

Files	Coverage Δ
ding/model/template/ngu.py	78.88% <ø> (ø)
ding/model/template/pg.py	94.11% <ø> (ø)
ding/model/template/wqmix.py	96.77% <ø> (+0.98%)	:arrow_up:

... and 15 files with indirect coverage changes