A Repeat kept up to 250 000 instances whatever its source held, and the
nested-instance count skipped the art of opacity masks. Expanding copied
the whole source for every kept instance, and a Repeat inside an enabled
mask was evaluated again for each outer copy.
The budget now counts the Repeats inside enabled opacity masks, and keeps
a second bound, MAX_REPEAT_COPIES, on the nodes and path anchors copied
in all (nested Repeats included).
Dylan M. Taylor
f204445119