input() with a prompt string on some terminals (zsh + Linux Mint) echoes
^M and the prompt doesn't flush before reading, causing the prompt to
appear stuck or not accept input.
Replace with explicit sys.stdout.write()+flush() + sys.stdin.readline()
which guarantees the prompt is flushed before blocking on stdin, and
readline() + .strip() handles both \n and \r\n line endings correctly.
Tests updated to use CliRunner(input=) which populates sys.stdin inside
the runner context (monkeypatching sys.stdin.readline directly is ignored
by CliRunner which replaces sys.stdin entirely).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Simone
5d3214d10c