sparklemotion/nokogiri — pull request #932 by ykzts (2013-07-03 15:26:21+00:00)
Title: Fix a regexp to guess HTML

```
1.9.1 :001 > Nokogiri.parse(open('https://github.com/sparklemotion/nokogiri/commits.atom').read).html?
=> true
1.9.1 :002 > Nokogiri.parse(open('https://github.com/sparklemotion/nokogiri/commits.atom').read).xml?
=> false
```

Atom is not HTML! Guess to HTML when string a "html" is included in a attribute-value.