Add documentation example to test

[andyfengHKU]

No description provided.

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (86d0c96) 89.61% compared to head (c8dac71) 89.64%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2125      +/-   ##
==========================================
+ Coverage   89.61%   89.64%   +0.02%     
==========================================
  Files         988      988              
  Lines       35644    35645       +1     
==========================================
+ Hits        31944    31954      +10     
+ Misses       3700     3691       -9     

Files	Coverage Δ
...de/function/list/functions/list_extract_function.h	91.66% <100.00%> (ø)
src/storage/store/node_table.cpp	100.00% <100.00%> (ø)

... and 3 files with indirect coverage changes

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