Doc: Verify code examples in README

[JSAbrahams]

Summary

• doc: for loops must close with end token

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.28%. Comparing base (e99e118) to head (cad4a5d).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #493      +/-   ##
===========================================
+ Coverage    91.26%   91.28%   +0.01%     
===========================================
  Files          113      113              
  Lines        15598    15598              
===========================================
+ Hits         14235    14238       +3     
+ Misses        1363     1360       -3     

see 1 file with indirect coverage changes

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