D just got a better formatting of existing template usage sorted
by descending unique instantiation count via the flag
`-vtemplates`. Each template that has a least one instantiation
is now printed using standard compiler diagnostics formatting for
easy navigation to the point of its declaration.
Additionally, a new feature is to instead of
`-vtemplates`
use
`-vtemplates=list-instances`
. Then the location(s) for each instance of each instantiated
template is printed along with information telling whether the
instantiation was implicit or explicit.
A good example of the behavior can be found in the test file [2]
[1] https://github.com/dlang/dmd/pull/11463
[2]
https://github.com/nordlow/dmd/blob/6b69ff7f0676314953344b5c920d960c023b3134/test/compilable/vtemplates_list.d
