[Bug go/79642] space instead of tab in lang.opt

[ian at airs dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79642

Ian Lance Taylor <ian at airs dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED

--- Comment #2 from Ian Lance Taylor <ian at airs dot com> ---
Fixed.  Thanks.