fix(lb):clean up lb documentation

[Laure-di]

trafficstars

close #1695

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 73.74%. Comparing base (7cf136f) to head (72d69e6). Report is 3 commits behind head on master.

:exclamation: Current head 72d69e6 differs from pull request most recent head 03a79f4. Consider uploading reports for the commit 03a79f4 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2421      +/-   ##
==========================================
- Coverage   73.78%   73.74%   -0.04%     
==========================================
  Files         229      229              
  Lines       35699    35761      +62     
==========================================
+ Hits        26339    26371      +32     
- Misses       7096     7115      +19     
- Partials     2264     2275      +11     

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