Comment 11 for bug 1366379

The "M" means "modified". Since as part of its bootstrap, CCL currently overwrites the binary and image with newly compiled variants, which usually differ from those checked into SVN, most compiled checkouts will have an "M", even if the user did no modification, and so the "M" is uninformative. If the checked in version happens to coincide (because e.g. as part of a release, the latest image and binary were checked in, and the build process somehow makes them idempotent), then there is no "M", but this is not usually informative, except for people who might be manually patching a release — a very unlikely condition where the user probably knows what he's doing anyway.