[Bug target/93694] Inconsistent grammar in darwin.opt

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93694

Iain Sandoe <iains at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2020-02-21
           Assignee|unassigned at gcc dot gnu.org      |iains at gcc dot gnu.org
   Target Milestone|---                         |10.0
     Ever confirmed|0                           |1