fix(demon): make max-items filter more robust

demon.go

@@ -65,7 +65,6 @@ func listen(history []string, histfile string, persist bool, max int) {
 		l := len(history)
 
 		if l > 0 {
-
 			// wl-paste will always give back the last copied text
 			// (as long as the place we copied from is still running)
 			if history[l-1] == text {
@@ -73,15 +72,13 @@ func listen(history []string, histfile string, persist bool, max int) {
 				continue
 			}
 
-			if l == max {
-				// we know that at any given time len(history) cannot be bigger than max,
-				// so it's enough to drop the first element
-				history = history[1:]
+			if l >= max {
+				// usually just one item, but more if we reduce our --max-items value
+				history = history[l-max+1:]
 			}
 
 			// remove duplicates
 			history = filter(history, text)
-
 		}
 
 		history = append(history, text)