CapsLock is the compose key, so Caps Lock has to live somewhere else, and
both Shifts together is where it went. That combination is easy to hit by
accident while typing, and the lock then sticks until you notice it and
hit both Shifts again.
shift:both_capslock_cancel sets the lock exactly the same way, but types
the Shift keys as ALPHABETIC rather than TWO_LEVEL, so the next lone
Shift releases it. Since a misfire happens while reaching for Shift
anyway, it clears itself almost immediately.
Compose is untouched: <CAPS> stays [Multi_key, Multi_key], so the
~/.XCompose emoji sequences work as before.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
