Render more relevant documentation on hover assertions of

[matiascr]

In assertions:

/// Case variants docs
pub type CaseVariant(generic_if_any) {
  Variant1
  Variant2(generic_if_any)
  /// Variant 3 docs
  Variant3(number: Int)
}

fn f(cv) {
  let assert Variant3(number: _) = cv
  cv.number
}

In the second line, the LS knows enough to tell that cv after the assert is a Variant3 and suggests the number field on completion. However, hovering over Variant3 or cv, the documentation provided now is CaseVariant(generic_if_any).
My suggestion would be to return the documentation as

CaseVariant.Variant3(number: String)

Variant 3 docs