{
			name: "contexts reconverging after api/next/* update",
			features: []string{
				"A",
				"pkg syscall, type RawSockaddrInet6 struct",
			},
			required: []string{
				"A",
				"pkg syscall (darwin-amd64), type RawSockaddrInet6 struct", // api/go1.n.txt
				"pkg syscall, type RawSockaddrInet6 struct",                // api/next/n.txt
			},
			ok:  true,
			out: "",
		},
		{

}

func (t *Tokenizer) Col() int {
	return t.s.Pos().Column
}

func (t *Tokenizer) Next() ScanToken {
	s := t.s
	for {
		t.tok = ScanToken(s.Scan())
		if t.tok != scanner.Comment {
			break
		}
		text := s.TokenText()
		t.line += strings.Count(text, "\n")
		if constraint.IsGoBuild(text) {
			t.tok = BuildComment
			break
		}
	}
	switch t.tok {
	case '\n':
		t.line++

At the start of a release development cycle, the contents of `next` should be deleted
and replaced with those of `initial`. From the repo root:

    > cd doc
    > rm -r next/*
    > cp -r initial/* next

Then edit `next/1-intro.md` to refer to the next version.

To prepare the release notes for a release, run `golang.org/x/build/cmd/relnote generate`.

the new API. This helps with our end-of-cycle audit of new APIs.
The same requirement applies to next/* (described below), which will
become a go1.XX.txt for XX >= 19.

The next/ directory contains the only files intended to be mutated.
Each file in that directory contains a list of features that may be added
to the next release of Go. The files in this directory only affect the
warning output from the go api tool. Each file should be named

	f.Add(b.Bytes())

	f.Fuzz(func(t *testing.T, b []byte) {
		r := NewReader(bytes.NewReader(b))
		type file struct {
			header  *Header
			content []byte
		}
		files := []file{}
		for {
			hdr, err := r.Next()
			if err == io.EOF {
				break
			}
			if err != nil {
				return
			}
			buf := bytes.NewBuffer(nil)
			if _, err := io.Copy(buf, r); err != nil {
				continue
			}

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package asm

import (
	"cmd/asm/internal/lex"
	"strings"
	"testing"
	"text/scanner"
)

type exprTest struct {
	input  string
	output int64
	atEOF  bool
}

var exprTests = []exprTest{
	// Simple
	{"0", 0, true},
	{"3", 3, true},
	{"070", 8 * 7, true},

	s.pos++
	if s.pos >= len(s.tokens) {
		return scanner.EOF
	}
	return s.tokens[s.pos].ScanToken
}

func (s *Slice) Text() string {
	return s.tokens[s.pos].text
}

func (s *Slice) File() string {
	return s.base.Filename()
}

func (s *Slice) Base() *src.PosBase {
	return s.base
}

func (s *Slice) SetBase(base *src.PosBase) {

	}

	nonRuntimeTests := []errtest{
		{"TEXT", "", "expect two or three operands for TEXT"},
		{"TEXT", "%", "expect two or three operands for TEXT"},
		{"TEXT", "1, 1", "TEXT symbol \"<erroneous symbol>\" must be a symbol(SB)"},
		{"TEXT", "$\"foo\", 0, $1", "TEXT symbol \"<erroneous symbol>\" must be a symbol(SB)"},
		{"TEXT", "$0É:0, 0, $1", "expected end of operand, found É"}, // Issue #12467.

type Token struct {
	ScanToken
	text string
}

// Make returns a Token with the given rune (ScanToken) and text representation.
func Make(token ScanToken, text string) Token {
	// Substitute the substitutes for . and /.
	text = strings.ReplaceAll(text, "\u00B7", ".")
	text = strings.ReplaceAll(text, "\u2215", "/")
	return Token{ScanToken: token, text: text}
}

func (l Token) String() string {

func drain(input *Input) string {
	var buf strings.Builder
	for {
		tok := input.Next()
		if tok == scanner.EOF {
			return buf.String()
		}
		if tok == '#' {
			continue
		}
		if buf.Len() > 0 {
			buf.WriteByte('.')
		}
		buf.WriteString(input.Text())
	}
}

type badLexTest struct {
	input string
	error string
}