[Bug] Hugo doesn't replace some emoji after a ":"

[memiks]

With the last master head version Hugo is not able to replace emoji after ":" character.

For example this text does not work:

test :

this is a test

test

🆒😊:🍕:blush : : blush: 🍕

So I try to replace code used in emoji.go by regexp, in order to work with all text.

[memiks]

i will try to contribute through a pull request but it is a little bit complicated to retrieve go package and use local source of Hugo etc...

So for the moment I push my code here : helpers/emoji.go

`
// Copyright 2016 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package helpers

import (
"regexp"
"sync"
"github.com/kyokomi/emoji"
)

var (
emojiInit sync.Once
regEmoji *regexp.Regexp
emojiMap = make(map[string]string)
)

// Emojify "emojifies" the input source.
// See http://www.emoji-cheat-sheet.com/
func Emojify(source []byte) []byte {
emojiInit.Do(initEmoji)

return []byte (regEmoji.ReplaceAllStringFunc(string(source), EmojiTranslateFunc))

}

func EmojiTranslateFunc(str string) string {
emoji, ok := emojiMap[str]
if ok {
return emoji
}
return str
}

func initEmoji() {
emojiMap = emoji.CodeMap()
regEmoji = regexp.MustCompile(":[a-zA-Z0-9_-]+:")
}

`

[bep]

Duplicate of #2198

[memiks]

Yes in fact my tescase does not work with the last version before your last commit @bep
That's why I try to correct it with regular expression.

I see you make speed test ? and corrected issue with an other method ? ok no problem for me ;)

Thanks,
Regards,
Mémîks.

[bep]

I haven't corrected this with another method. I added your test case to master to make sure that we were on the page. It passed. If you tell me that a test case fixed the issue, that sounds weird.

[github-actions]

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