More encoding specs for four-byte sequences
More encoding specs for four-byte sequences

Now that we can handle four-byte UTF-8 sequences, update the specs to
try for new bad combinations.

Signed-off-by: Wincent Colaiuta <c76ac2e9cd86441713c7dfae92c451f3e6d17fdc@wincent.com>

barnaclebarnes/wikitext,wincent/wikitext,geni/wikitext,barnaclebarnes/wikitext,wincent/wikitext,geni/wikitext,geni/wikitext,barnaclebarnes/wikitext