website update

[tcak via Digitalmars-d-learn]

On Monday, 10 August 2015 at 10:34:56 UTC, Tony wrote:
> It looks like this page:
>
> http://dlang.org/hash-map.html
>
> Should have the override keyword added the the member functions 
> in Foo:
>
> class Foo
> {
>     int a, b;
>
>     size_t toHash() { return a + b; }
>
>     bool opEquals(Object o)
>     {
>         Foo foo = cast(Foo) o;
>         return foo && a == foo.a && b == foo.b;
>     }
> }

Also that return line is confusing. Some parenthesis could be put 
there.