exe/git-multi in git-multi-4.0.1 vs exe/git-multi in git-multi-5.0.0

@@ -9,11 +9,11 @@
 if !STDIN.tty?
   # read list of repo full names from STDIN (~pseudo multi-repo)
   multi_repo = STDIN.readlines.map(&:strip).map(&:freeze).freeze
   # reopen STDIN (to ensure all `Kernel.system` based cmds work)
   STDIN.reopen('/dev/tty')
-elsif (command = ARGV.shift)&.start_with? '++'
-  multi_repo = command[2..-1]
+elsif (command = ARGV.shift)&.start_with?('++')
+  multi_repo = command.delete('++')
   command = nil
 end
 
 begin
   case (command ||= ARGV.shift)