Infobox parser returns only the first element if value is a list

[aplz]

In the German version of Wikipedia, there are a couple of infoboxes containing lists as values, for instance https://de.wikipedia.org/wiki/Lewisit.
In such cases, the parser returns only the first element.
For instance, using

import wptools
wikipage = wptools.page('Lewisit', lang='de', silent=True).get_parse()
for infobox_item in wikipage.infobox:
    print(infobox_item, wikipage.infobox[infobox_item])

we get
('Dichte', u'*1,8793 g\xb7cm<sup>\u22123</sup> (25 \xb0C, trans-Isomer)')

The expected result would, according to the Wikipedia article look like this:
('Dichte', u' *1,8793 g·cm<sup>−3</sup> (25 °C, trans-Isomer) <ext><name>ref</name><attr> name="Whiting"</attr></ext> *1,8598 g·cm<sup>−3</sup> (25 °C, cis-Isomer) <ext><name>ref</name><attr> name="Whiting"</attr></ext> ')

One way to fix this would be to adapt the code similar to the proposal in this stackoverflow answer

[siznax]

Thanks again for the contribution, @aplz!

[aplz]

Thanks for merging, @siznax!