Formatting AST including `@trusted` delegate produces invalid output

[Geod24]

TL;DR: Test case for formatter.d:

testFormatNode!(AssertExpression)("static assert(() @trusted { return bar()(3); }() == 4);");

Was trying to update libdparse for dlang.org (dlang/dlang.org#2758) and hit this bug.
The code:

 assert(() @trusted { return bar()(3); }() == 4);

from here is turned into:

assert (() @trusteddo
{ return bar()(3);
}() == 4)

by formatter, which is obviously invalid.

[WebFreak001]

related to #346

[Geod24]

Fixed by #399

[WebFreak001]

@Geod24 fyi you can link pull requests in issues (and link issues in pull requests) to automatically close them with a reference:

[Geod24]

I don't have that kind of power in dlang-community ;)