Proposed automated edit: Typos at end of values are quite common and in many cases it is quite easy to recover intended value

My personal ‘best’ is miss-hitting the enter key and on the way down pushing the + key immediately left of the enter key also on my italian keyboard. The result is for instance having leaf_type=broadleaved by first touching B which autofills broadleaved in JOSM and ID, but then when going to enter hitting the + key first resulting in a leaf_type=b+. On occasion I’ve been contacted what g+, b+ c+ etc means on the many nodes since after the first tree it’s copy+C and on and on copy+V whereever the mouse gets pointed and away the replication of the typo goes on a meadow orchard. No notification that the value is not right. The incorrect values can loiter for months on the map by the many.

On occasion I notice myself when reloading a data set of the same area as when typing a leaf_type=B, it wont autofill broadleaved anymore as JOSM remembers previous values used. Then the search function is great to seek them out and correct.