Disable colors for dotc -decompile tests

Author: nicolasstucki

project/scripts/sbtTests

@@ -30,7 +30,7 @@ fi
 
 # check that `sbt dotc -decompile` runs
 echo "testing sbt dotc -decompile"
-./project/scripts/sbt ";dotc -decompile -classpath out/scriptedtest1 -code dotrtest.Test" >  sbtdotc3.out
+./project/scripts/sbt ";dotc -decompile -code -color:never -classpath out/scriptedtest1 dotrtest.Test" >  sbtdotc3.out
 cat sbtdotc3.out
 if grep -e "def main(args: Array\[String\]): Unit =" sbtdotc3.out; then
     echo "output ok"