Your answer is absolutely pure gold for a new page linked from
‘--debug’
Highlight the portion of each line used for sorting. Also issue
warnings about questionable usage to stderr.in the Info manual! Please don't let it go to waste sitting in the bug tracker. Perhaps call it Debugging examples. You can pretty much just quote the entire exchange between you and me. P.S., Yes indeed I had LC_COLLATE=C so maybe --debug should mention where in the environment it made it choices from too.
