[Issue 9631] Error message not using fully qualified name when appropriate.

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=9631

--- Comment #12 from Adam D. Ruppe <destructionator at gmail.com> ---
> Fully qualifying all types in error messages leads to unreadable error messages.

I would say if the compiler ever sees `if(t1.toChars == t2.toChars) print
toPrettyChars instead`.

But there's another option too.... just output the unreadable error messages on
a compiler switch and let external programs like IDEs filter them.

The switch could be `-v`, though I still actually really want to see XML error
messages, they could list soooooo much info for ides or external filters.

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