[Issue 13084] ModuleInfo.opApply delegate expects immutable parameter

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13084

--- Comment #15 from Walter Bright <bugzilla at digitalmars.com> ---
(In reply to Kenji Hara from comment #13)
> All D programmers would assume that unqualified type name T is a mutable
> type,

There were some bumps in transitioning to the immutable alias 'string', but it
all turned out for the best. The compiler complains if you do anything wrong,
and this proposal fixes the breaking code issue.

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