docs(collections): fix typos and improve example

[kt3k]

trafficstars

[codecov[bot]]

Codecov Report

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

Project coverage is 91.88%. Comparing base (32227e6) to head (48037de). Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4763      +/-   ##
==========================================
- Coverage   91.89%   91.88%   -0.01%     
==========================================
  Files         485      485              
  Lines       41308    41308              
  Branches     5317     5317              
==========================================
- Hits        37959    37957       -2     
- Misses       3292     3294       +2     
  Partials       57       57              

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