Problem with un-quoted translatable attributes

Created by: Anonymous

Original issue 126 created by @ysavourel on 2010-03-08T18:29:39.000Z:

Currently if we have this:

the merged translation remains un-quoted, causing possible lose of text if
the translation has more than one word:

Such problem actually occurs relatively frequently with some languages,
and is difficutle to detect and fix automatically.
It seems the filter needs to produce a skeleton that quotes un-quoted
extractable attribute values.