If you use echo -e $(put sgr0)"text" - reset color attributes, it turns out the artifact (Btext

watch.c

@@ -289,6 +289,11 @@ static void process_ansi(FILE * fp)
 	char *numstart, *endptr;
 
 	c = getc(fp);
+
+	if (c == '(') {
+		c = getc(fp);
+		c = getc(fp);
+	}
 	if (c != '[') {
 		ungetc(c, fp);
 		return;