fails:Process.kill tests for the existence of a process without sending a signal
fails:Process.kill raises an EPERM if permission is denied
fails:Process.kill sends the given signal to the specified process
fails:Process.kill kills process groups if signal is negative
fails:Process.kill kills process groups if signal starts with a minus sign
fails:Process.kill kills process groups if signal starts with a minus sign and 'SIG'
windows(JRUBY-4317):Process.kill raises an ArgumentError for unknown signals
windows(JRUBY-4317):Process.kill doesn't accept lowercase signal names
windows(JRUBY-4317):Process.kill doesn't tolerate leading or trailing spaces in signal names