Documentation for `IteratorRandom` is confusing about what "sized iterators" means

[ChaiTRex]

From the top of the docs page for rand::seq::IteratorRandom, it says:

This trait is implemented on all sized iterators, providing methods for choosing one or more elements.

Sized can have two meanings: Sized and ExactSizeIterator (one might naively assume it needs to know the number of elements in the iterator to know how to not go past the end of it).

Since it appears from the source code that it refers to Sized, can the documentation please be updated to:

This trait is implemented on all Sized iterators, providing methods for choosing one or more elements.

[dhardy]

The impl is shown in the documentation:

impl<I> IteratorRandom for I where
    I: Iterator + Sized, 

Okay, maybe it should say "This trait is implemented on all iterators I: Iterator + Sized" or some such. Make a PR if you like.