Why is single quote sign escaped inside render element attribute?

When attribute text contains a single quote, like "It’s a nice day" that single quote when rendered is escaped to "It's a nice day". Why is that happening and can it be prevented? Is twig doing that escaping?

https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Template%21Attribute.php/class/Attribute/8.2.x

it says:

"The attribute keys and values are automatically escaped for output with Html::escape()."

and also:

"The attribute values are considered plain text and are treated as such. If a safe HTML string is detected, it is converted to plain text with PlainTextOutput::renderFromHtml() before being escaped."

Neither of those should do that conversion.

This article was republished from its original source.
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Why is single quote sign escaped inside render element attribute?

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