tests: make tests compatible with rich 14.3.3

[mcepl]

It seems that with the upgrade to rich 14.3.3 (what we have in openSUSE/Tumbleweed) stylize function eats EOLs. I have modified tests to acommodate that, and I hope it should be universal enough so that even with older versions of rich nothing should break.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.59%. Comparing base (dc266d8) to head (42afcf3).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1678   +/-   ##
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  Coverage   99.59%   99.59%           
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  Files          23       23           
  Lines        5677     5677           
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  Hits         5654     5654           
  Misses         23       23           

Flag	Coverage Δ
unittests	99.59% <ø> (ø)

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[tleonhardt]

@mcepl What version of cmd2 are you packaging in openSUSE/Tumbleweed? I ask because there have been a lot of little changes and bug fixes in recent versions of rich and cmd2 4.0.0 requires rich >= 15.0.0. Even cmd2 3.5.1, the latest version in the 3.x line, also requires rich >= 15.0.0.

@kmvanbrunt is intimately familiar with the recent rich releases and what bug fixes were in each, so he is the one that should review this as a potential change.

Regardless, you could need to run ruff format first to comply with our auto-formatting rules. We have a make check convenience command built into our repo which runs all of our auto-formatting and linting checks using prek.

[kmvanbrunt]

The issue isn't with cmd2. Rich fixed a bug in version 15.0.0 where Text.from_ansi() didn't preserve all trailing newlines. Prior to their fix, cmd2 included a monkey patch that resolved this bug.

You are using a setup with a new version of cmd2 (no monkey patch) and an old version of Rich (14.3.3) which does not include the fix. It's an incompatible configuration. As @tleonhardt mentioned, cmd2 requires rich >=15.0.0. 

[mcepl]

On Sat Jun 6, 2026 at 9:06 PM CEST, Kevin Van Brunt wrote: You are using a setup with a new version of `cmd2` (no monkey patch) and an old version of Rich (14.3.3) which does not include the fix. It's an incompatible configuration. ***@***.*** mentioned, `cmd2` requires `rich >=15.0.0`. 

Yes, you are right, with rich 15.0.0 the test suite passes. You can close this ticket.