j and k move the caret one line, delegated to sublime's own `move` command
so they behave exactly like the arrow keys. They dispatch through the
existing ACTIONS registry, so the keymap, the status-bar hints and the ?
popup all stay in sync through the single KEY_GROUPS table.
Unlike the other letter keys, j / k keep no command_mode context: the view
is read-only, so leaving them live while Vintage is in command mode can
only ever move the caret. That asymmetry was previously documented only in
a comment, which was wrong (it claimed j / k were the only unguarded
bindings, but escape has always carried its own context instead). It is now
pinned by test_command_mode_guard_is_deliberate, so normalising the keymap
fails the suite with the reason attached.
Also tidies two long lines in commands.py.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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