I'm impressed that in 2012 there is still no Scala mode packaged with jEdit. I have to manually go find it and copy it into the OS X app bundle sub directory, and go edit the Catalog file??
I think this should be automatically included:
as well as these entries to Catalog:
<MODE NAME="scala" FILE="scala.xml"
<MODE NAME="sbt" FILE="scala.xml"
sciss ( sciss ) - 2012-09-19 09:46:21 PDT
text area and syntax packages