ref: bc930a121466e0e33b46ff01db0153f5cfb79054
parent: ac6fd11ddad3cc52adeeb16a49f71666549fa547
author: Simon Tatham <anakin@pobox.com>
date: Sun Sep 21 11:33:01 EDT 2014
Improve connectedness-error highlighting in Singles. Using exactly the same policy as I did for Range the other day: if multiple regions exist, then one is taken to be canonical and all the others are marked as errors. [originally from svn r10233]