etree.htmlfile doesn't escape attribute values

[Burak Arslan]

>>> from lxml import etree
>>> etree.LXML_VERSION
(3, 6, 0, 0)
>>>
>>> from lxml import html
>>> from lxml.etree import htmlfile
>>> from lxml.html.builder import E
>>> from StringIO import StringIO
>>> out = StringIO()
>>> with htmlfile(out) as f:
... with f.element("tagname", attrib={"attr": '"misquoted"'}):
... f.write("foo")
...
>>> out.getvalue()
'<tagname attr=""misquoted"">foo</tagname>'
>>> import sys
>>> from lxml import etree
>>>
Python : sys.version_info(major=2, minor=7, micro=11, releaselevel='final', serial=0)
lxml.etree : (3, 6, 0, 0)
libxml used : (2, 9, 3)
libxml compiled : (2, 9, 3)
libxslt used : (1, 1, 28)
libxslt compiled : (1, 1, 28)

[Burak Arslan (robots-0)]

Expected output:

'<tagname attr="&quot;misquoted&quot;">foo</tagname>'

[scoder (scoder)]

FIxed in lxml 3.7.2.