Fix documentation of `HomogeneousTuple`
Compare the docs of `Itertools::collect_tuple` that already mention the correct upper bound on the number of tuple elements.
@@ -11,7 +11,7 @@ use std::marker::PhantomData;
// hiding the implementation details of `TupleCollect`.
// See https://github.com/rust-itertools/itertools/issues/387
-/// Implemented for homogeneous tuples of size up to 4.
+/// Implemented for homogeneous tuples of size up to 12.
pub trait HomogeneousTuple
: TupleCollect
{}
