[Issue 13310] Old style multiple alias declaration not documented

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13310

--- Comment #1 from briancschott at gmail.com ---
Looking at the D1 documentation, you can find this:

AliasDeclaration:
    alias Decl

Decl:
    BasicType Declarators ;

Declarators:
    DeclaratorInitializer , DeclaratorIdentifierList

DeclaratorInitializer:
    Declarator

DeclaratorIdentifierList:
    DeclaratorIdentifier
    DeclaratorIdentifier , DeclaratorIdentifierList

DeclaratorIdentifier:
    Identifier

It appears that DMD is accepting code that is valid in D1 but not valid in D2
without issuing any sort of deprecation warning or compiler error.

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