bufferHelper("no newlines at all", "no newlines at all");
    bufferHelper("two lines\nbut no newline at end", "two lines\n", "but no newline at end");
    bufferHelper(
        "\nempty first line\nno newline at end", "\n", "empty first line\n", "no newline at end");
    bufferHelper("three\rlines\rno newline at end", "three\r", "lines\r", "no newline at end");
    bufferHelper("mixed\nline\rendings\r\n", "mixed\n", "line\r", "endings\r\n");
  }

    bufferHelper("no newlines at all", "no newlines at all");
    bufferHelper("two lines\nbut no newline at end", "two lines\n", "but no newline at end");
    bufferHelper(
        "\nempty first line\nno newline at end", "\n", "empty first line\n", "no newline at end");
    bufferHelper("three\rlines\rno newline at end", "three\r", "lines\r", "no newline at end");
    bufferHelper("mixed\nline\rendings\r\n", "mixed\n", "line\r", "endings\r\n");
  }

    private enum Separator {
        NewLine(true, TextUtil.getPlatformLineSeparator()),
        Empty(false, " "),
        Colon(false, ": "),
        ColonNewLine(true, ":" + TextUtil.getPlatformLineSeparator());

        Separator(boolean newLine, String text) {
            this.newLine = newLine;
            this.text = text;
        }

        final boolean newLine;
        final String text;
    }

[GOOS:plan9] skip 'filesystem disallows \n in paths'

# If the directory path containing a package to be built includes a newline,
# the go command should refuse to even try to build the package.

env DIR=$WORK${/}${newline}'package main'${newline}'func main() { panic("uh-oh")'${newline}'/*'

mkdir $DIR
cd $DIR
exec pwd
cp $WORK/go.mod ./go.mod
cp $WORK/main.go ./main.go
cp $WORK/main_nocgo.go ./main_nocgo.go

// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Test a source file does not need a final newline.
// Compiles but does not run.

// No newline at the end of this file.

// test case from issue

type _ interface{
	m /* ERROR unexpected name int in interface type; possibly missing semicolon or newline or } */ int
}

// other cases where the fix for this issue affects the error message

const (
	x int = 10 /* ERROR unexpected literal "foo" in grouped declaration; possibly missing semicolon or newline or \) */ "foo"
)

# Check that a newline is printed after the buffer's contents.
cd fail
! go test .
! stderr .
stdout '^exitcode=1\n'
stdout '^FAIL\s+example/fail'

# In local directory mode output is streamed, so we don't know
# whether the test printed anything at all, so we print the exit code
# (just in case it failed without emitting any output at all),
# and that happens to add the needed newline as well.
! go test
! stderr .

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

package p

// These error messages are for the invalid literals on lines 19 and 20:

// ERROR "newline in character literal|newline in rune literal"
// ERROR "invalid character literal \(missing closing '\)|rune literal not terminated"

const (
	_ = ''     // ERROR "empty character literal or unescaped ' in character literal|empty rune literal"

// parser after missing type. There should be exactly
// one error each time, with now follow errors.

package p

type T /* ERROR unexpected newline */

type Map map[int] /* ERROR unexpected newline */

// Examples from go.dev/issue/23434:

func g() {
	m := make(map[string] /* ERROR unexpected ! */ !)
	for {
		x := 1
		print(x)
	}
}

func f() {

		n++
	} else {
		n, err = rr.reader.Read(p)
	}

	if err != nil {
		return n, err
	}

	// Do nothing if record-delimiter is already newline.
	if string(rr.recordDelimiter) == "\n" {
		return n, nil
	}

	// Change record delimiters to newline.
	if len(rr.recordDelimiter) == 1 {
		for idx := 0; idx < len(p); {
			i := bytes.Index(p[idx:], rr.recordDelimiter)
			if i < 0 {
				break
			}