[Bug c++/119191] Add fix-it for missing argument list in operator()

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119191

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #0)
> callop.cc:3:16: error: expected type-specifier before ‘(’ token
>     3 |   void operator(int, int);
>       |                ^

Oops, I posted the output from testing a version of the test using
operator(int, int) instead of operator(int) but it didn't affect the
diagnostics, except for the quoted source shown in the caret diagnostic.