/bin/sh is probably a symlink to something other than bash though. It's not using any features/functions of the shell other than to execute scala. It's a stretch calling that a script.

That's a one-line Bash wrapper to invoke Scala (line 2) with the original arguments sent to the Scala script, compiling the Scala code which follows below. You can read more at the bottom of the man page here: http://www.scala-lang.org/docu/files/tools/scala.html