[Issue 19592] Rule for SuperClass is wrong

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19592

--- Comment #1 from Basile B. <b2.temp at gmx.com> ---
The way it's done in DMD parser seems to say that 

    Identifier "[" AssignExpression "]" "." IdentifierList

should rather be

    Identifier "[" AssignExpression "]" ( "." IdentifierList )opt

(link 3 of OP)

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