refactor/eg/testdata/d.txtar

-- go.mod --
module example.com
go 1.18

-- template/template.go --
package template

import "fmt"

// Test of semantic (not syntactic) matching of basic literals.

func before() (int, error) { return fmt.Println(123, "a") }
func after() (int, error)  { return fmt.Println(456, "!") }

-- in/d1/d1.go --
package d1

import "fmt"

func example() {
	fmt.Println(123, "a")         // match
	fmt.Println(0x7b, `a`)        // match
	fmt.Println(0173, "\x61")     // match
	fmt.Println(100+20+3, "a"+"") // no match: constant expressions, but not basic literals
}

-- out/d1/d1.go --
package d1

import "fmt"

func example() {
	fmt.Println(456, "!")         // match
	fmt.Println(456, "!")         // match
	fmt.Println(456, "!")         // match
	fmt.Println(100+20+3, "a"+"") // no match: constant expressions, but not basic literals
}