namespace declarations do not appear in deterministic order in output

[jbowtie]

Technically this isn't really an issue - the output is correct according to the XML spec - but it causes several tests to fail seemingly at random.

For example, see REC/test-7.1.1 (which is currently disabled pending investigation into this issue).

Making the test harness smart enough to recognise XML output and do canonicalization first would be a reasonable fix. Alternatively, sorting by prefix before writing (and fixing up the associated expected output) would be another way to fix it.

[jbowtie]

From the libxslt suite it looks like tests 54, 71, 87 are definitely manifestations of this issue.

Also potentially affected are tests 92, 122, 124, and 150.