Python 3 preparation: update next() usage for iterators. Tool-assisted patch. Note that various classes in TAL code with next() methods are not actually Python iterators and so are not changed in this patch, but roundup/cgi/ZTUtils/Iterator.py includes the IterIter class which converts between the two styles of iterator.

{
    "validthis": true,
    "laxcomma" : true,
    "laxbreak" : true,
    "browser"  : true,
    "eqnull"   : true,
    "debug"    : true,
    "devel"    : true,
    "boss"     : true,
    "expr"     : true,
    "asi"      : true
}