message: Adapt test and docs to remove outdated limitations
  Those limitations were removed when const generics became available.
diff: @@ -32,12 +32,6 @@ impl Binary {
  }
  /// Copies content into fixed-sized array.
  - /// The result type `A: ByteArray` is a workaround for
  - /// the missing [const-generics](https://rust-lang.github.io/rfcs/2000-const-generics.html).
  - /// `A` is a fixed-sized array like `[u8; 8]`.
  - ///
  - /// ByteArray is implemented for `[u8; 0]` to `[u8; 64]`, such that
  - /// we are limited to 64 bytes for now.
  ///
  /// # Examples
  ///
  @@ -418,8 +412,7 @@ mod tests {
  let a: Binary = b"................................".into();
  assert_eq!(a.len(), 32);
  - // for length > 32 we need to cast
  - let a: Binary = (b"................................." as &[u8]).into();
  + let a: Binary = b".................................".into();
  assert_eq!(a.len(), 33);
  }
  