quantity.Discrete.plot: minor fix for long titles

+quantity/Discrete.m

@@ -1236,6 +1236,8 @@ classdef  (InferiorClasses = {?quantity.Symbolic}) Discrete ...
 					myTitle = split(myTitle);
 					if numel(myTitle) > 2
 						myTitle = myTitle(1) + " [ \ldots ] " + myTitle(end);
+					else
+						myTitle = join(myTitle);
 					end
 				end
 			end % titleHelper()