Example in docs for optional<T&> copy constructor is wrong

[barry.revzin@…]

In the documentation for Optional in the latest version, and many past versions, the example in the copy constructor for optional<T&> reads:

T v = 2 ; T& ref = v ;
optional<T> init(ref);
assert ( *init == v ) ;

optional<T> init2 ( init ) ;
assert ( *init2 == v ) ;

v = 3 ;

assert ( *init  == 3 ) ;
assert ( *init2 == 3 ) ;

Both init and init2 should be of type optional<T&>, not optional<T>.