Git bug. gitattributes' pattern does not respect spaces in the filenames

[Alexey Shumkin <Alex.Crezoff@gmail.com>]

Hello everyone!

There's a description for the understanding of a
situation.
I have a project on Windows. I use Git under Cygwin.
There are some *.xml in the project. But some of them are in cp1251
encoding, another ones are in UTF-8. For the first ones there is no
need of any conversion to see the git-diff, but for the *.xml's in UTF-8
I set

*.xml diff=utf8-to-cp1251

And according to this I have
$ git config diff.utf8-to-cp1251.textconv 'iconv -f utf-8 -t cp1251'

Unfortunately, *.xml's in cp1251 DOES match this pattern, too.
As far as cp1251 and UTF-8 files are in different folders,
it is logically enough to set pattern like

<folder with a UTF-8-xmls>/*.xml diff=utf8-to-cp1251

for the UTF-8 files.
BUT!
Unfortunately, <folder with a UTF-8-xmls> have spaces in its name,
so textconv filter does not work because of error of
parsing .gitattributes

I have no enough skills to patch Git to fix this error.
Is anybody interested in to do?

Thanks