<p class="container">
  <img src="https://invalid.cat/cat.jpg" alt="二足歩行で歩き回るネコ"/>
</p>
img {
  white-space: pre;
}
img:before { 
  content: "表示したかった\A『";
}
img:after { 
  content: "』\Aの画像が見つからんかったわ😇\AURLは " attr(src) " なんやが…";
}

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