- Update to 4.12.2:
  * Fixed an unhandled exception in BeautifulSoup.decode_contents
    and methods that call it. [bug=2015545]
- 4.12.1:
  * This version of Beautiful Soup replaces setup.py and setup.cfg
    with pyproject.toml. Beautiful Soup now uses tox as its test backend
    and hatch to do builds.
  * The main functional improvement in this version is a nonrecursive technique
    for regenerating a tree. This technique is used to avoid situations where,
    in previous versions, doing something to a very deeply nested tree
    would overflow the Python interpreter stack:
    1. Outputting a tree as a string, e.g. with
       BeautifulSoup.encode() [bug=1471755]
    2. Making copies of trees (copy.copy() and
       copy.deepcopy() from the Python standard library). [bug=1709837]
    3. Pickling a BeautifulSoup object. (Note that pickling a Tag
       object can still cause an overflow.)
  * Making a copy of a BeautifulSoup object no longer parses the
    document again, which should improve performance significantly.
  * When a BeautifulSoup object is unpickled, Beautiful Soup now
    tries to associate an appropriate TreeBuilder object with it.
  * Tag.prettify() will now consistently end prettified markup with
    a newline.
  * Added unit tests for fuzz test cases created by third
    parties. Some of these tests are skipped since they point
    to problems outside of Beautiful Soup, but this change
    puts them all in one convenient place.
  * PageElement now implements the known_xml attribute. (This was technically
    a bug, but it shouldn't be an issue in normal use.) [bug=2007895]
  * The demonstrate_parser_differences.py script was still written in
    Python 2. I've converted it to Python 3, but since no one has
    mentioned this over the years, it's a sign that no one uses this
    script and it's not serving its purpose.
- 4.12.0:
  * Introduced the .css property, which centralizes all access to
    the Soup Sieve API. This allows Beautiful Soup to give direct
    access to as much of Soup Sieve that makes sense, without cluttering
    the BeautifulSoup and Tag classes with a lot of new methods.
    This does mean one addition to the BeautifulSoup and Tag classes
    (the .css property itself), so this might be a breaking change if you
    happen to use Beautiful Soup to parse XML that includes a tag called
    <css>. In particular, code like this will stop working in 4.12.0:
      soup.css['id']
    Code like this will work just as before:
      soup.find_one('css')['id']
    The Soup Sieve methods supported through the .css property are
    select(), select_one(), iselect(), closest(), match(), filter(),
    escape(), and compile(). The BeautifulSoup and Tag classes still
    support the select() and select_one() methods; they have not been
    deprecated, but they have been demoted to convenience methods.
    [bug=2003677]
  * When the html.parser parser decides it can't parse a document, Beautiful
    Soup now consistently propagates this fact by raising a
    ParserRejectedMarkup error. [bug=2007343]
  * Removed some error checking code from diagnose(), which is redundant with
    similar (but more Pythonic) code in the BeautifulSoup constructor.
    [bug=2007344]
  * Added intersphinx references to the documentation so that other
    projects have a target to point to when they reference Beautiful
    Soup classes. [bug=1453370]
- 4.11.2:
  * Fixed test failures caused by nondeterministic behavior of
    UnicodeDammit's character detection, depending on the platform setup.
    [bug=1973072]
  * Fixed another crash when overriding multi_valued_attributes and using the
    html5lib parser. [bug=1948488]
  * The HTMLFormatter and XMLFormatter constructors no longer return a
    value. [bug=1992693]
  * Tag.interesting_string_types is now propagated when a tag is
    copied. [bug=1990400]
  * Warnings now do their best to provide an appropriate stacklevel,
    improving the usefulness of the message. [bug=1978744]
  * Passing a Tag's .contents into PageElement.extend() now works the
    same way as passing the Tag itself.
  * Soup Sieve tests will be skipped if the library is not installed.
- 4.11.1:
  This release was done to ensure that the unit tests are packaged along
  with the released source. There are no functionality changes in this
  release, but there are a few other packaging changes:
  * The Japanese and Korean translations of the documentation are included.
  * The changelog is now packaged as CHANGELOG, and the license file is
    packaged as LICENSE. NEWS.txt and COPYING.txt are still present,
    but may be removed in the future.
  * TODO.txt is no longer packaged, since a TODO is not relevant for released
    code.
- 4.11.0:
  * Ported unit tests to use pytest.
  * Added special string classes, RubyParenthesisString and RubyTextString,
    to make it possible to treat ruby text specially in get_text() calls.
    [bug=1941980]
  * It's now possible to customize the way output is indented by
    providing a value for the 'indent' argument to the Formatter
    constructor. The 'indent' argument works very similarly to the
    argument of the same name in the Python standard library's
    json.dump() function. [bug=1955497]
  * If the charset-normalizer Python module
    (https://pypi.org/project/charset-normalizer/) is installed, Beautiful
    Soup will use it to detect the character sets of incoming documents.
    This is also the module used by newer versions of the Requests library.
    For the sake of backwards compatibility, chardet and cchardet both take
    precedence if installed. [bug=1955346]
  * Added a workaround for an lxml bug
    (https://bugs.launchpad.net/lxml/+bug/1948551) that causes
    problems when parsing a Unicode string beginning with BYTE ORDER MARK.
    [bug=1947768]
  * Issue a warning when an HTML parser is used to parse a document that
    looks like XML but not XHTML. [bug=1939121]
  * Do a better job of keeping track of namespaces as an XML document is
    parsed, so that CSS selectors that use namespaces will do the right
    thing more often. [bug=1946243]
  * Some time ago, the misleadingly named "text" argument to find-type
    methods was renamed to the more accurate "string." But this supposed
    "renaming" didn't make it into important places like the method
    signatures or the docstrings. That's corrected in this
    version. "text" still works, but will give a DeprecationWarning.
    [bug=1947038]
  * Fixed a crash when pickling a BeautifulSoup object that has no
    tree builder. [bug=1934003]
  * Fixed a crash when overriding multi_valued_attributes and using the
    html5lib parser. [bug=1948488]
  * Standardized the wording of the MarkupResemblesLocatorWarning
    warnings to omit untrusted input and make the warnings less
    judgmental about what you ought to be doing. [bug=1955450]
  * Removed support for the iconv_codec library, which doesn't seem
    to exist anymore and was never put up on PyPI. (The closest
    replacement on PyPI, iconv_codecs, is GPL-licensed, so we can't use
    it--it's also quite old.)

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