fix: populate tables and test ReST table

[pohlt]

ReST, markdown, and confluence tables are tested with the actual installed packages. Furthermore, the ReST table is being parsed by docutils for errors.

[pohlt]

This PR is a preparation for issue #73, because currently the ReST tables are tested without actual packages and the resulting ReST string is not being parsed by docutils.

[raimon49]

Thank you for P-R.

I have confirmed running the test including evaluating the rest parser.

We maintain the code style according to PEP 8.

Could you fix the following?

============================================================= FAILURES =============================================================
________________________________________________________ pycodestyle-check _________________________________________________________
/git/pip-licenses/test_piplicenses.py:54:80: E501 line too long (95 > 79 characters)
/git/pip-licenses/test_piplicenses.py:59:80: E501 line too long (93 > 79 characters)

[pohlt]

Sure. Done.

[codecov[bot]]

Codecov Report

Merging #74 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #74   +/-   ##
=======================================
  Coverage   98.45%   98.45%           
=======================================
  Files           1        1           
  Lines         323      323           
=======================================
  Hits          318      318           
  Misses          5        5           

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[raimon49]

@pohlt OK, thank you for your contribution!!