Make tests pass on small terminal width

[socksy]

when I ran cargo test locally it failed... because my terminal window was smaller than the help text we were asserting against, so the line breaks were misplaced. This makes that test a bit more resilient against that by flattening the text before asserting.

Summary by CodeRabbit

• Tests
  • Improved command-line help output tests by disabling terminal-width wrapping during validation.
  • Ensured beta labels remain consistently displayed and matched in help text assertions.

[coderabbitai]

📝 Walkthrough

Walkthrough

Help-output tests now disable terminal line wrapping when rendering catalog and root command help, keeping beta-label assertions consistent across short, long, and subcommand help.

Changes

CLI help assertions

Layer / File(s)	Summary
Disable help wrapping in beta-label assertions crates/tower-cmd/src/catalogs.rs, crates/tower-cmd/src/lib.rs	Catalog, storage subcommand, and root help tests render with term_width(0) before checking [beta] markers.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Possibly related PRs

• tower/tower-cli#241: Introduced the tower catalogs command help whose assertions are updated here.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main change: updating help-output tests to pass when the terminal width is small.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/help-test-terminal-width

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