[Issue 17263] Issue diagnostic if mandatory template parameter is missing

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=17263

--- Comment #7 from Ali Cehreli <acehreli at yahoo.com> ---
If you are asking me, the reporter, I am happy with your explanation why it
can't be better. I wouldn't mind closing.

--