s = s[len(tag):]
			// Check the tag is followed by a proper separator
			if len(s) > 0 && bytes.IndexByte(tagEndSeparators, s[0]) != -1 {
				return res + i
			}
			res += len(tag)
		}
		res += i + plen
	}
	return -1
}

// tAttr is the context transition function for the attribute state.
func tAttr(c context, s []byte) (context, int) {
	return c, len(s)
}

	cmd := &cobra.Command{
		Use:   "generate <revision-tag>",
		Short: "Generate configuration for a revision tag to stdout",
		Long: `Create a revision tag and output to the command's stdout. Tag an Istio control plane revision for use with namespace istio.io/rev
injection labels.`,
		Example: `  # Create a revision tag from the "1-8-0" revision
  istioctl tag generate prod --revision 1-8-0 > tag.yaml

  # Apply the tag to cluster

)

func (tag Tag) String() string {
	return tag.Key + "=" + tag.Value
}

// IsEmpty returns whether this tag is empty or not.
func (tag Tag) IsEmpty() bool {
	return tag.Key == ""
}

// Validate checks this tag.
func (tag Tag) Validate() error {
	if len(tag.Key) == 0 || utf8.RuneCountInString(tag.Key) > 128 {
		return errInvalidTagKey
	}

func (tag Tag) IsEmpty() bool {
	return tag.Key == ""
}

// Validate checks this tag.
func (tag Tag) Validate() error {
	if len(tag.Key) == 0 || utf8.RuneCountInString(tag.Key) > 128 {
		return errInvalidTagKey
	}

	if utf8.RuneCountInString(tag.Value) > 256 {
		return errInvalidTagValue
	}

	return nil

// license that can be found in the LICENSE file.

// Package tag contains functionality handling tags and related data.
package tag // import "golang.org/x/text/internal/tag"

import "sort"

// An Index converts tags to a compact numeric value.
//
// All elements are of size 4. Tags may be up to 4 bytes long. Excess bytes can
// be used to store additional information about the tag.
type Index string

import java.math.BigDecimal;

import static org.gradle.performance.results.report.Tag.FixedTag.UNTAGGED;

public interface Tag {
    String getName();

    String getClassAttr();

    String getTitle();

    String getUrl();

    default boolean isValid() {
        return this != UNTAGGED;
    }

    enum FixedTag implements Tag {

apiVersion: release-notes/v2
kind: feature
area: installation
releaseNotes:
  - |
    **Added** `istioctl experimental revision tag` command group. Revision tags act as aliases for
    control plane revisions. Users can label their namespaces with a revision tag rather than pointing them
    directly at a revision and selectively decide the granularity of their namespace labels. This makes it possible

git branch -m master
git tag v1.0.0

at 2019-07-15T17:17:27-04:00
cp _next/main.go main.go
git add main.go
git commit -m 'add init function'

git log --oneline --decorate=short
cmp stdout .git-log

-- .git-log --
b325d82 (HEAD -> master) add init function
8da67e0 (tag: v1.0.0) all: add go.mod and main.go
-- go.mod --
module vcs-test.golang.org/git/commit-after-tag.git

go 1.13
-- main.go --

apiVersion: release-notes/v2
kind: promotion
area: istioctl
releaseNotes:
  - |

apiVersion: release-notes/v2
kind: feature
area: installation
releaseNotes:
  - |
    **Updated** `istioctl tag set default` to control which revision handles Istio resource validation. The revision indicated
    through the default tag will also win leader elections and assume singleton cluster responsibilities.

upgradeNotes:
  - title: Default revision must be switched when performing a revision-based upgrade.
    content: |