--- a/util/interpolation.lua	Tue Sep 08 22:50:43 2020 +0200
+++ b/util/interpolation.lua	Wed Sep 09 17:10:33 2020 +0100
@@ -64,6 +64,9 @@
 			elseif opt == '&' then
 				if not value then return ""; end
 				return render(s_sub(block, e), values);
+			elseif opt == '~' then
+				if value then return ""; end
+				return render(s_sub(block, e), values);
 			elseif opt == '?' and not value then
 				return render(s_sub(block, e), values);
 			elseif value ~= nil then