Re: BUG #15548: Unaccent does not remove combining diacritical characters

I have been doing a bit more than a review by studying by myself the
new format and the old format, and the way we could do things in the
XML parsing part, and hacked the code by myself.  On top of the
incorrect URL for Latin-ASCII.xml, I have noticed as well that there
should be only one block transforms/transform/tRule in the source, so
I think that we should add an assertion on that as a sanity check.  I
have also changed the code to use splitlines(), which is more portable
across platforms, and added an extra regression test for the new
characters added to unaccent.rules.  This does not close this thread
but we can support the new format this way.  I have also documented
the way to browse the full set of releases for Latin-ASCII.xml, and
precisely which version has been used for this patch.

This does not close yet the part for diacritical characters, but
supporting the new format is a step into this direction.  What do
you think?