This PR for the documentation of the [html.parser](https://docs.python.org/3/library/html.parser.html) module will
- fix a terminology mistake (‘start of a tag’ -> ‘start tag of an element’);
- mention the parameter names of the `HTMLParser.handle_*` methods where missing.
.. method:: HTMLParser.handle_starttag(tag, attrs)
- This method is called to handle the start of a tag (e.g. ``<div id="main">``).
+ This method is called to handle the start tag of an element (e.g. ``<div id="main">``).
The *tag* argument is the name of the tag converted to lower case. The *attrs*
argument is a list of ``(name, value)`` pairs containing the attributes found