Multiple levels of <type> generated by AutoDoc.

Imported from http://bugzilla.roxen.com/bugzilla/show_bug.cgi?id=1903

Reported by Martin Nilsson, IDA nilsson@pike.ida.liu.se

The autodoc

*! @mixed @[arr] *! @type array

becomes

which appears to by one level too many tags. BTW, should autodoc references persists in the refdoc XML format as above (or is the autodoc syntax illegal and the extractor just didn't complain)?