1. The contract in the docs was wrong.
2. The docs used `#f' where the code was expecting 'disable, so made it
accept both.
3. Don't recommend disabling the timer -- I had a case where the
connection was left for more than a day as a result. (Probably
because there was a message after the receipt email.)
`make-module-evaluator' accepting only modules with the specified
language.
* Fix a bug with deciding on how to convert values for printing.
* Improved code in checker.ss.
svn: r11955
