[luatex] Spurious omega

[Andreas Matthias]

I have a tex-file `test.tex':

\directlua{require 'foo'}
\bye


And a lua-file `foo.lua':

tex.print(
   [[
         xxx
   ]])


I expected the output to be `xxx'. However, it is followed
by a spurious uppercase omega. What's happening here?


Ciao
Andreas