correct the @After hook example

[capaj]

as it was before it was a bit confusing.

This example would have worked much better if the TODO left in code about passing the return value was implemented.
Then it could be something like:

[codecov]

Codecov Report

Merging #66 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #66   +/-   ##
=======================================
  Coverage   91.18%   91.18%           
=======================================
  Files          60       60           
  Lines         658      658           
  Branches       29       29           
=======================================
  Hits          600      600           
  Misses         56       56           
  Partials        2        2

---

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Additional details and impacted files

@@            Coverage Diff            @@
##             master      #66   +/-   ##
=========================================
  Coverage          ?   91.18%           
=========================================
  Files             ?       60           
  Lines             ?      658           
  Branches          ?       29           
=========================================
  Hits              ?      600           
  Misses            ?       56           
  Partials          ?        2           

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