4.9.1:
* Added a keyword argument 'on_duplicate_attribute' to the
BeautifulSoupHTMLParser constructor (used by the html.parser tree
builder) which lets you customize the handling of markup that
contains the same attribute more than once, as in:
<a href="url1" href="url2">
* Added a distinct subclass, GuessedAtParserWarning, for the warning
issued when BeautifulSoup is instantiated without a parser being
specified.
* Added a distinct subclass, MarkupResemblesLocatorWarning, for the
warning issued when BeautifulSoup is instantiated with 'markup' that
actually seems to be a URL or the path to a file on
disk.
* The new NavigableString subclasses (Stylesheet, Script, and
TemplateString) can now be imported directly from the bs4 package.
* If you encode a document with a Python-specific encoding like
'unicode_escape', that encoding is no longer mentioned in the final
XML or HTML document. Instead, encoding information is omitted or
left blank.
* Fixed test failures when run against soupselect 2.0.
a8cb3ec322