Support HTML attributes without quotes (Fix #1141)

[rhysd]

Marked version: 0.3.17

Markdown flavor: Markdown.pl|CommonMark|GitHub Flavored Markdown

Description

• Fixes HTML Attributes without quote is broken #1141

I modified a regex to match HTML tags to

^<!--[\s\S]*?-->|^<\/?[a-zA-Z0-9\-]+(?:="[^"]*"|='[^']*'|=[^<>\s]+|\s[^<=>\/\s]*)*?\/?>

For example, when matching to <a href=https://example.com>,

• \s[^<=>\/\s]* matches to attribute name just before =: href
• =[^<>\s]+ matches to = and attribute value without quotes: =https://example.com
• Regex in (?:...) matches only strings starting with = or \s. So finally it breaks and matches to the last >

Contributor

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• no tests required for this PR.
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• Draft GitHub release notes have been updated.
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[UziTech]

@Feder1co5oave does #1135 address this?

[Feder1co5oave]

Yes

[joshbruce]

Closing in favor of #1135