[Bug diagnostics/124464] RFE: Add ability to quote command line

[dmalcolm at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124464

--- Comment #5 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Or even: 

crab1: error: unclosed delimiter ‘(’ in command-line argument 2
'-frust-crate-attr'
  argument[2] | -frust-crate-attr="(option1"
              |                    ^