Use a string property to illustrate #or + #env

[skuro]

Using a number in the example is misleading since it produces either a string or a long. Better use something that isn't a number to begin with

[codecov-io]

Codecov Report

Merging #95 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #95   +/-   ##
=======================================
  Coverage   79.13%   79.13%           
=======================================
  Files           4        4           
  Lines         369      369           
  Branches       17       17           
=======================================
  Hits          292      292           
  Misses         60       60           
  Partials       17       17           

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