Database format, format of communication between PHP and texvc and
PHP code is not touched. Upgrade shouldn't bring any problems.
Changes:
* cases envinonment supported
* \left and \right must be followed by delimiters, and must balance.
It could generate some parse errors on previously accepted
input. It could happen in two cases:
* this input was invalid latex anyway
* some valid delimiters is not on texvc's list
* \big \bigg \Big \Bigg supported (they must be followed by delimiters)
* \ddots supported
Please update
test.wikipedia.org, and if no bugs are found in
the next few days, update all Wikipedias.