patch 8.1.1321: no docs or tests for listener functions commit https://github.com/vim/vim/commit/a334772967de25764ed7b11d768e8b977818d0c6 Author: Bram Moolenaar <Bram@vim.org> Date: Sat May 11 21:14:24 2019 +0200 patch 8.1.1321: no docs or tests for listener functions Problem: No docs or tests for listener functions. Solution: Add help and tests for listener_add() and listener_remove(). Invoke the callbacks before redrawing.

TYPEMAP
VIWIN	T_VIOBJNOMUNGE
VIBUF	T_VIOBJNOMUNGE

INPUT
T_VIOBJNOMUNGE
	if (sv_isa($arg, \"${ntype}\")) {
	    IV tmp = SvIV((SV*)SvRV($arg));
	    $var = INT2PTR($type, tmp);
	    if (!tmp)
		croak(\"$ntype no longer exists\");
	}
	else
	    croak(\"$var is not of type ${ntype}\")