It is not clear whether this feature was once documented and used (it
would have been 20 years ago).
It is mostly disable now, but there was a remaining bit that is
annoying now.
I'll try to restore this later.
}
break;
+#if 0
+// FIXME: resurrect this later
// 'Locks' the math inset. A 'locked' math inset behaves as a unit
// that is traversed by a single <CursorLeft>/<CursorRight>.
case LFUN_INSET_TOGGLE:
lock(!lock());
cur.popForward();
break;
+#endif
case LFUN_SELF_INSERT:
// special case first for big delimiters