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:arg name: the name of the element
:arg attrs: the attributes of the element as a dict
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:returns: EmptyTag token
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For example:
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>>> # Give it an empty tree just so it instantiates
>>> walker = TreeWalker([])
>>> list(walker.text(''))
[]
>>> list(walker.text(' '))
[{u'data': ' ', u'type': u'SpaceCharacters'}]
>>> list(walker.text(' abc ')) # doctest: +NORMALIZE_WHITESPACE
[{u'data': ' ', u'type': u'SpaceCharacters'},
{u'data': u'abc', u'type': u'Characters'},
{u'data': u' ', u'type': u'SpaceCharacters'}]
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