[[!map ]] can generate bad HTML with unbalanced open/close tags (in XML terms: "not well-formed") in certain situations. This appears to be a regression caused by fixing maps with nested directories sometimes make ugly lists, which suppressed some redundant </ul><ul> pairs, but appears not to have the ideal logic for this, leading to malformed HTML.

In particular, on a site with these pages:

• alpha
  • 1
    • i
    • ii
    • iii
    • iv
  • 2
    • a
    • b
  • 3
• beta

the maps "alpha/1 or beta", "alpha/1/i* or alpha/2/a or beta" and "alpha/1/i* or alpha/2/a" have malformed HTML.

My ready/map branch adds a regression test and makes it pass.

The fix is not particularly elegant - it generates the previous HTML with redundant </ul><ul> pairs, marks the redundant pairs, and edits them out afterwards - but it works. If anyone can come up with a cleaner algorithm that avoids generating the redundant tags in the first place, that would be even better. --smcv

merged (not thrilled at this solution, but it works) --Joey