Findings (bugs/regressions)

1. alt-r handler references a non-existent attribute
   • In mycli/key_bindings.py the alt-r binding passes highlight_style=mycli.style. There is no MyCli.style attribute; the rest of the code uses mycli.syntax_style. This will raise AttributeError when alt-r is used (and highlight_preview is enabled or not — the attribute access happens unconditionally).
   • Fix: use mycli.syntax_style here for consistency with the ctrl-r path.
   • File: mycli/key_bindings.py

Missing tests / edge cases

1. No tests covering highlight preview option plumbing
   • Add a unit test around search_history() options generation to ensure:
     • When highlight_preview=True and pygmentize is available, the preview command includes pygmentize with the configured syntax_style.
     • When highlight_preview=False or pygmentize missing, it uses the plain printf preview.
   • Also add a simple test around key binding handlers to ensure they pass syntax_style (and don’t reference style).

If you want, I can patch the mycli.style bug and add a minimal test.

Example: