Check that the modernize analyzer does not report
invalid SuggestedFixes on an unclosed struct literal.

See golang/go#81590.

-- flags --
-ignore_extra_diags
-min_go=go1.27

-- a.go --
//go:build go1.27
package a

type B struct { x int }
type A struct { B }

var _ = A{B: B{x: 1
