Do not sort hgwebdir repositories if python list or tuple is given.
This was introduced by changeset
f67d1468ac50 (util: add sort helper)
# should print nothing
# should fail
abort: path 'b/x' is inside repo 'b'
abort: path 'b/x' is inside repo 'b'
# should fail
abort: path 'b/x' is inside repo 'b'
# should arguably print nothing
# should fail
abort: path 'b/a' is inside repo 'b'