C1      string `xml:"space1 x>c"`
			D1      string `xml:"space1 x>d"`
		}{
			XMLName: Name{
				Space: "space0",
				Local: "top",
			},
			A:  "a",
			B:  "b",
			C:  "c",
			C1: "c1",
			D1: "d1",
		},
		ExpectXML: `<top xmlns="space0">` +
			`<x><a>a</a><b>b</b>` +
			`<c xmlns="space">c</c>` +
			`<c xmlns="space1">c1</c>` +
			`<d xmlns="space1">d1</d>` +

	//
	// If this is >= 1<<63, the page reclaimer is done scanning
	// the page marks.
	reclaimIndex atomic.Uint64

	// reclaimCredit is spare credit for extra pages swept. Since
	// the page reclaimer works in large chunks, it may reclaim
	// more than requested. Any spare pages released go to this
	// credit pool.
	reclaimCredit atomic.Uintptr

		println()
		printunlock()
	}
}

// enlistWorker encourages another dedicated mark worker to start on
// another P if there are spare worker slots. It is used by putfull
// when more work is made available.
//
//go:nowritebarrier
func (c *gcControllerState) enlistWorker() {
	// If there are idle Ps, wake one so it will run an idle worker.

	{"banana", "a", "a", 1, "banana"},
	{"☺☻☹", "", "<>", -1, "<>☺<>☻<>☹<>"},
}

func TestReplace(t *testing.T) {
	for _, tt := range ReplaceTests {
		in := append([]byte(tt.in), "<spare>"...)
		in = in[:len(tt.in)]
		out := Replace(in, []byte(tt.old), []byte(tt.new), tt.n)
		if s := string(out); s != tt.out {
			t.Errorf("Replace(%q, %q, %q, %d) = %q, want %q", tt.in, tt.old, tt.new, tt.n, s, tt.out)