XDXF: XdxfTransformer removes spaces around XML tags

[soshial]

The spaces between tags should be preserved:

The original XDXF code is:

<ar><k>grzebiący</k><def> <def> <pos>прич. от</pos> <b>grzebać</b>; </def><def><co> grzebiące, grzebiących</co> <pos>мн. зоол.</pos> кури́ные <pos>lm</pos> (Galliformes) </def></def></ar>

[ilius]

Is this not part of #532?

[soshial]

#532 is about XDXF in StarDict and has too many issues mentioned.
But I noticed this problem with spaces also in XDXF -> AardSlob conversion, so I decided to move into a separate ticket.