Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.50%. Comparing base (b85d5b9) to head (e453f36).
⚠️ Report is 5 commits behind head on master.

@@            Coverage Diff             @@
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+ Coverage   81.29%   81.50%   +0.20%     
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  Files          21       21              
  Lines        1679     1692      +13     
  Branches      262      266       +4     
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+ Hits         1365     1379      +14     
  Misses        234      234              
+ Partials       80       79       -1     

My initial idea was to expose the _justify() function to at least the software_columns() and block_text() methods, but after a second look at those methods, I think it's better to keep block_text() as-is to avoid breaking the API.
Instead, I'm going to extend software_columns() to also support single-column text (single-item list), since it currently doesn't.

This way, users will have two possible ways to print a block of text:

• Backwards compatible block_text("Text string", font="A", width=None), which will align the text as usual, according to the printer defaults or by the set(align="") method that do not support justify.
• software_columns(["Single item"], width=[column_width], align="center|left|right|justify") which will align the text according to the align parameter (supports justify) and can also benefit from truncation and placeholders for words that are too long.

CI pipeline is green.

I think this is ready for review @patkan.