fmt.Println(a.Split("banana", 1))
	fmt.Println(a.Split("banana", 2))
	zp := regexp.MustCompile(`z+`)
	fmt.Println(zp.Split("pizza", -1))
	fmt.Println(zp.Split("pizza", 0))
	fmt.Println(zp.Split("pizza", 1))
	fmt.Println(zp.Split("pizza", 2))
	// Output:
	// [b n n ]
	// []
	// [banana]
	// [b nana]
	// [pi a]
	// []
	// [pizza]
	// [pi a]
}

func ExampleRegexp_Expand() {

// package comment
package main

import (
	"errors"
	"fmt"
	"io"
	"log"
	"math"
)

import (
	"fmt"

	"math"

	"log"

	"errors"

	"io"
)

// We reset the line numbering to test that
// the formatting works independent of line directives
//line :19

import (
	"errors"
	"fmt"
	"io"
	"log"
	"math"

	"fmt"

	"math"

	"log"

	"errors"

	"io"

	fmt.Printf("%s", &stringerv)
	fmt.Printf("%v", &stringerv)
	fmt.Printf("%T", &stringerv)
	fmt.Printf("%s", &embeddedStringerv)
	fmt.Printf("%v", &embeddedStringerv)
	fmt.Printf("%T", &embeddedStringerv)
	fmt.Printf("%v", notstringerv)
	fmt.Printf("%T", notstringerv)
	fmt.Printf("%q", stringerarrayv)
	fmt.Printf("%v", stringerarrayv)
	fmt.Printf("%s", stringerarrayv)
	fmt.Printf("%v", notstringerarrayv)
	fmt.Printf("%T", notstringerarrayv)

	assert.Equal(t, ua, fmt.Sprintf("%v", uaNotTruncated))

	ua = ""
	for i := 0; i < maxUserAgentLength*2; i++ {
		ua = ua + "a"
	}
	req.Header.Set("User-Agent", ua)
	uaTruncated := &lazyTruncatedUserAgent{req}
	assert.NotEqual(t, ua, fmt.Sprintf("%v", uaTruncated))

	usUnknown := &lazyTruncatedUserAgent{}
	assert.Equal(t, "unknown", fmt.Sprintf("%v", usUnknown))
}

		// type for test
		fmt.Fprintf(w, "type Z%du1 struct {\n", s)
		fmt.Fprintf(w, "  b   bool\n")
		fmt.Fprintf(w, "  val [%d]byte\n", s)
		fmt.Fprintf(w, "}\n")

		fmt.Fprintf(w, "type Z%du2 struct {\n", s)
		fmt.Fprintf(w, "  i   uint16\n")
		fmt.Fprintf(w, "  val [%d]byte\n", s)
		fmt.Fprintf(w, "}\n")

		// function being tested
		fmt.Fprintf(w, "//go:noinline\n")
		fmt.Fprintf(w, "func zero%du1_ssa(t *Z%du1) {\n", s, s)

			fmt.Println("\tis digit rune")
		}
		if unicode.IsGraphic(c) {
			fmt.Println("\tis graphic rune")
		}
		if unicode.IsLetter(c) {
			fmt.Println("\tis letter rune")
		}
		if unicode.IsLower(c) {
			fmt.Println("\tis lower case rune")
		}
		if unicode.IsMark(c) {
			fmt.Println("\tis mark rune")
		}
		if unicode.IsNumber(c) {
			fmt.Println("\tis number rune")
		}
		if unicode.IsPrint(c) {

	for _, typ := range types {
		fmt.Fprintf(w, "for i, test := range %v_tests {\n", typ)
		fmt.Fprintf(w, "	for j, x := range %v_vals {\n", typ)
		fmt.Fprintf(w, "		want := test.exp.l\n")
		fmt.Fprintf(w, "		if j == test.idx {\nwant = test.exp.e\n}")
		fmt.Fprintf(w, "		else if j > test.idx {\nwant = test.exp.r\n}\n")
		fmt.Fprintf(w, "		if test.fn(x) != want {\n")
		fmt.Fprintf(w, "			fn := runtime.FuncForPC(reflect.ValueOf(test.fn).Pointer()).Name()\n")

	}
}

func genOp() {
	w := new(bytes.Buffer)
	fmt.Fprintf(w, "// Code generated from _gen/*Ops.go using 'go generate'; DO NOT EDIT.\n")
	fmt.Fprintln(w)
	fmt.Fprintln(w, "package ssa")

	fmt.Fprintln(w, "import (")
	fmt.Fprintln(w, "\"cmd/internal/obj\"")
	for _, a := range archs {
		if a.pkg != "" {
			fmt.Fprintf(w, "%q\n", a.pkg)
		}
	}
	fmt.Fprintln(w, ")")

	// generate Block* declarations

		fmt.Fprintln(w, "\tMOVV\t(R20), R30")
		fmt.Fprintln(w, "\tADDV\t$8, R20")
		fmt.Fprintln(w, "\tMOVV\tR30, (R21)")
		fmt.Fprintln(w, "\tADDV\t$8, R21")
		fmt.Fprintln(w)
	}
	fmt.Fprintln(w, "\tRET")
}

func tagsPPC64x(w io.Writer) {
	fmt.Fprintln(w)
	fmt.Fprintln(w, "//go:build ppc64 || ppc64le")
	fmt.Fprintln(w)
}

func zeroPPC64x(w io.Writer) {
	// R0: always zero

	fmt.Println(b.String())

	// Output: 3...2...1...ignition
}

func ExampleCompare() {
	fmt.Println(strings.Compare("a", "b"))
	fmt.Println(strings.Compare("a", "a"))
	fmt.Println(strings.Compare("b", "a"))
	// Output:
	// -1
	// 0
	// 1
}

func ExampleContains() {
	fmt.Println(strings.Contains("seafood", "foo"))
	fmt.Println(strings.Contains("seafood", "bar"))
	fmt.Println(strings.Contains("seafood", ""))