remapNamespacePrefix: Preserve prefix of attribute names
Created by: nthykier
Preserve prefix of attribute names when copying them over to the new
node. This fixes an unintentional rewrite of xml:space
to space
that also caused scour to strip whitespace that should have been
preserved.
Closes: #239 (closed) Signed-off-by: Niels Thykier niels@thykier.net