if doc.Links[key] != nil {
				return nil, fmt.Errorf("duplicate link reference %q; second in %s", key, filename)
			}
			doc.Links[key] = link
		}
	}
	// Remove headings with empty contents.
	doc.Blocks = removeEmptySections(doc.Blocks)
	if len(doc.Blocks) > 0 && len(doc.Links) > 0 {
		// Add a blank line to separate the links.
		lastPos := lastBlock(doc).Pos()
		lastPos.StartLine += 2

			rs = overrideRoots(ctx, rs, []module.Version{{Path: "go", Version: v}})

			// We need to add a 'go' version to the go.mod file, but we must assume
			// that its existing contents match something between Go 1.11 and 1.16.
			// Go 1.11 through 1.16 do not support graph pruning, but the latest Go
			// version uses a pruned module graph — so we need to convert the
			// requirements to support pruning.

	// The map keys are the elements of Analysis.Required,
	// and the type of each corresponding value is the required
	// analysis's ResultType.
	ResultOf map[*Analyzer]interface{}

	// ReadFile returns the contents of the named file.
	//
	// The only valid file names are the elements of OtherFiles
	// and IgnoredFiles, and names returned by
	// Fset.File(f.FileStart).Name() for each f in Files.
	//

		The version of the installed Go tree, as reported by runtime.Version.
	`,
}

var HelpFileType = &base.Command{
	UsageLine: "filetype",
	Short:     "file types",
	Long: `
The go command examines the contents of a restricted set of files
in each directory. It identifies which files to examine based on
the extension of the file name. These extensions are:

	.go
		Go source files.
	.c, .h
		C source files.

}

// makeEvent creates an Event from the provided information.
//
// It's just a convenience function; it's always OK to construct
// an Event manually if this isn't quite the right way to express
// the contents of the event.
func makeEvent(table *evTable, ctx schedCtx, typ event.Type, time Time, args ...uint64) Event {
	ev := Event{
		table: table,
		ctx:   ctx,
		base: baseEvent{
			typ:  typ,
			time: time,

//		The file is a JSON struct with a single field, named 'Replace', that
//		maps each disk file path (a string) to its backing file path, so that
//		a build will run as if the disk file path exists with the contents
//		given by the backing file paths, or as if the disk file path does not
//		exist if its backing file path is empty. Support for the -overlay flag
//		has some limitations: importantly, cgo files included from outside the

A string value is a (possibly empty) sequence of bytes.
The number of bytes is called the length of the string and is never negative.
Strings are immutable: once created,
it is impossible to change the contents of a string.
The predeclared string type is <code>string</code>;
it is a <a href="#Type_definitions">defined type</a>.
</p>

<p>
The length of a string <code>s</code> can be discovered using

	trailers, err := http2commaSeparatedTrailers(req)
	if err != nil {
		return err
	}
	hasTrailers := trailers != ""
	contentLen := http2actualContentLength(req)
	hasBody := contentLen != 0
	hdrs, err := cc.encodeHeaders(req, cs.requestedGzip, trailers, contentLen)
	if err != nil {
		return err
	}

	// Write the request.
	endStream := !hasBody && !hasTrailers
	cs.sentHeaders = true

		go func() {
			defer wg.Done()

			contentLen := fmt.Sprintf("Content-Length: %d", test.contentLength)
			if test.chunked {
				contentLen = "Transfer-Encoding: chunked"
			}
			_, err := fmt.Fprintf(conn, "POST /?readbody=%v HTTP/1.1\r\n"+
				"Connection: close\r\n"+
				"%s\r\n"+
				"Expect: %s\r\nHost: foo\r\n\r\n",
				test.readBody, contentLen, test.expectation)
			if err != nil {

	}
	sort.Slice(sortedFiles, func(i, j int) bool { return sortedFiles[i].Name() < sortedFiles[j].Name() })
	return sortedFiles, nil
}

// OverlayPath returns the path to the overlaid contents of the
// file, the empty string if the overlay deletes the file, or path
// itself if the file is not in the overlay, the file is a directory
// in the overlay, or there is no overlay.