Add a test to demonstrate issue 13 is not an issue

[aerorahul]

Description
This PR:

• adds a test to demonstrate the stderr file is not binary by reading the contents and printing them

Fixes #13

Type of change

• New feature (non-breaking change which adds functionality) Adds a test.

How Has This Been Tested?

• pynorms
• pytests

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes need updates to the documentation. I have made corresponding changes to the documentation
• My changes generate no new warnings
• New and existing tests pass with my changes
• Any dependent changes have been merged and published

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 50.88%. Comparing base (942b90b) to head (6ff9b2f).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop      #20   +/-   ##
========================================
  Coverage    50.88%   50.88%           
========================================
  Files           16       16           
  Lines         1476     1476           
  Branches       313      313           
========================================
  Hits           751      751           
  Misses         669      669           
  Partials        56       56           

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[HenryRWinterbottom]

I am not sure if this is a planned future test, but if so, the Python string library provides an easy way to define alphabet strings (see the RTDs). Other than that, approved.