func (tw *Writer) WriteHeader(hdr *Header) error {
	if err := tw.Flush(); err != nil {
		return err
	}
	tw.hdr = *hdr // Shallow copy of Header

	// Avoid usage of the legacy TypeRegA flag, and automatically promote
	// it to use TypeReg or TypeDir.
	if tw.hdr.Typeflag == TypeRegA {
		if strings.HasSuffix(tw.hdr.Name, "/") {
			tw.hdr.Typeflag = TypeDir
		} else {
			tw.hdr.Typeflag = TypeReg
		}
	}

or a union of terms <code>t<sub>1</sub>|t<sub>2</sub>|…|t<sub>n</sub></code>
[<a href="#Go_1.18">Go 1.18</a>].
Together with method specifications, these elements enable the precise
definition of an interface's type set as follows:
</p>

<ul>
	<li>The type set of the empty interface is the set of all non-interface types.
	</li>

<p>
The preceding section gave a formal definition of data-race-free program execution.
This section informally describes the semantics that implementations must provide
for programs that do contain races.
</p>

<p>
Any implementation can, upon detecting a data race,
report the race and halt execution of the program.
Implementations using ThreadSanitizer

				},
		*/
	}, {
		file: "testdata/trailing-slash.tar",
		tests: []testFnc{
			testHeader{Header{Name: strings.Repeat("123456789/", 30)}, nil},
			testClose{nil},
		},
	}, {
		// Automatically promote zero value of Typeflag depending on the name.
		file: "testdata/file-and-dir.tar",
		tests: []testFnc{
			testHeader{Header{Name: "small.txt", Size: 5}, nil},
			testWrite{"Kilts", 5, nil},

description: The go command, standard library, or anything else
title: "import/path: issue title"

body:
  - type: markdown
    attributes:
      value: |
        Thanks for helping us improve! 🙏 Please answer these questions and provide as much information as possible about your problem.

  - type: input
    id: go-version
    attributes:
      label: Go version
      description: |
        What version of Go are you using (`go version`)?

## Compiler {#compiler}

The build time overhead to building with [Profile Guided Optimization](/doc/pgo) has been reduced significantly.
Previously, large builds could see 100%+ build time increase from enabling PGO.
In Go 1.23, overhead should be in the single digit percentages.

## Assembler {#assembler}

      render: shell
    validations:
      required: true
  - type: textarea
    id: what-did-you-do
    attributes:
      label: "What did you do?"
      description: "If possible, provide a recipe for reproducing the error. A complete runnable program is good. A link on [go.dev/play](https://go.dev/play) is better. A failing unit test is the best."
    validations:
      required: true
  - type: textarea