Update macro docs a bit
/// Creates a new [`StaticVec`](crate::StaticVec) from a [`vec!`](alloc::vec::Vec)-style
/// pseudo-slice. The newly created [`StaticVec`](crate::StaticVec) will have a capacity and length
/// exactly equal to the number of elements in the so-called slice. The "array-like" `[value; N]`
-/// syntax is also supported, and both forms can be used in const contexts.
+/// syntax is also supported, and both forms can be used in const contexts. This macro has no
+/// particular trait impl requirements for the input type.
///
/// Example usage:
/// ```
