Lower the assume intrinsic to a MIR statement

compiler/rustc_mir_transform/src/coverage/spans.rs

@@ -826,6 +826,7 @@ pub(super) fn filtered_statement_span(statement: &Statement<'_>) -> Option<Span>
         // Retain spans from all other statements
         StatementKind::FakeRead(box (_, _)) // Not including `ForGuardBinding`
         | StatementKind::CopyNonOverlapping(..)
+        | StatementKind::Assume(..)
         | StatementKind::Assign(_)
         | StatementKind::SetDiscriminant { .. }
         | StatementKind::Deinit(..)