version-3.53.4
Because version 3.52.0 was withdrawn, that means QRF has never been officially released. Hence the new nMultiInsert field of the spec can be moved out of the extensions area and into the main part of the spec, and the version number can drop back from 2 to 1.
Add developer note on how to measure coverage of QRF.
Fix QRF so that it works sensibly with "--wrap 1"
Fix a few doc typos and inconsistencies. No code changes.