How pass multiple args to debug_args?

[MaoPann]

If submitting a bug please make sure

• If you are using gdb
  • gdb --version >= 7.7.1
  • it works on the command line with gdb
  • cwd and target are properly set
• If you are using lldb
  • lldb --version >= 3.7.1
  • it works on the command line with lldb-mi
  • cwd and target are properly set

Screenshots are helpful but not required