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  • \$\begingroup\$ It need to join result strings. \$\endgroup\$ Commented Sep 7, 2018 at 8:55
  • \$\begingroup\$ @mazzy: From the task description: »As long as the program is valid, it may contain excess characters other than # and ; as all other characters are ignored.« \$\endgroup\$ Commented Sep 7, 2018 at 10:39
  • \$\begingroup\$ as you wish :-) \$\endgroup\$ Commented Sep 7, 2018 at 11:10
  • \$\begingroup\$ quotation marks can be removed. $args is enough. \$\endgroup\$ Commented Sep 7, 2018 at 13:49
  • \$\begingroup\$ Unless the argument is numeric. \$\endgroup\$ Commented Sep 7, 2018 at 14:28