Current version
"Does not constrain values to within the range, because out-of-range values are sometimes intended and useful. The constrain() function may be used either before or after this function, if limits to the ranges are desired. "
Suggested version
"Does not constrain values to within the range, because out-of-range values are sometimes intended and useful. For example: if the incoming value is below the fromLow value, the outgoing value will be negative in proportion to the given toLow - toHigh range. The constrain() function may be used either before or after this function, if limits to the ranges are desired. "
I didn't know what exactly the map function would do with out-of range numbers. With a short explanation like this I would have understood immediately. I think it would be quite helpful to other learners (ok, noobs) like myself.
P.S. the reference page says to post suggestions in the forum and gives a link. Is this the correct forum?