refactor/eg/testdata/k.txtar

This test checks that a composite literal whose type is
inferred from its context (go1.28) matches only literals
of the same type. See go.dev/issue/82039.

-- go.mod --
module example.com
go 1.28

-- lib/lib.go --
package lib

type T struct{ X, Y int }

type U struct{ X, Y int }

func F(T) {}

func G(U) {}

-- template/template.go --
package template

import "example.com/lib"

func before() lib.T { return {1, 2} }
func after() lib.T  { return {2, 1} }

-- in/k1/k1.go --
package k1

import "example.com/lib"

func example() {
	lib.F({1, 2}) // match
	lib.G({1, 2}) // no match: different type
}

-- out/k1/k1.go --
package k1

import "example.com/lib"

func example() {
	lib.F({2, 1}) // match
	lib.G({1, 2}) // no match: different type
}