message: style: add support for astyle 3.1
diff: @@ -9,6 +9,7 @@ ASTYLE_VER_REQUIRED_1="Artistic Style Version 2.05.1"
  ASTYLE_VER_REQUIRED_2="Artistic Style Version 2.06"
  ASTYLE_VER_REQUIRED_3="Artistic Style Version 3.0"
  ASTYLE_VER_REQUIRED_4="Artistic Style Version 3.0.1"
  +ASTYLE_VER_REQUIRED_5="Artistic Style Version 3.1"
  astyle_ver() {
  echo "At least ${ASTYLE_VER_REQUIRED_1} is required"
  @@ -28,7 +29,8 @@ else
  if [ "$ASTYLE_VER" != "$ASTYLE_VER_REQUIRED_1" -a \
  "$ASTYLE_VER" != "$ASTYLE_VER_REQUIRED_2" -a \
  "$ASTYLE_VER" != "$ASTYLE_VER_REQUIRED_3" -a \
  - "$ASTYLE_VER" != "$ASTYLE_VER_REQUIRED_4" ];
  + "$ASTYLE_VER" != "$ASTYLE_VER_REQUIRED_4" -a \
  + "$ASTYLE_VER" != "$ASTYLE_VER_REQUIRED_5" ];
  then
  echo "Error: you're using ${ASTYLE_VER}"
  echo "but should be using ${ASTYLE_VER_REQUIRED} instead"
  