Use a more esoteric encoding in IO.new tests
Use a more esoteric encoding in IO.new tests

This is to fix some specs that were failing on a system where the
default external encoding was already set to ISO-8859-1.

As the :internal_encoding option is ignored when it is the same as the
external encoding, certain tests would fail due to the IO object's
internal encoding being nil.

heftig/rubinius,Wirachmat/rubinius,kachick/rubinius,sferik/rubinius,benlovell/rubinius,jemc/rubinius,dblock/rubinius,ngpestelos/rubinius,pH14/rubinius,sferik/rubinius,Azizou/rubinius,Azizou/rubinius,pH14/rubinius,pH14/rubinius,digitalextremist/rubinius,Wirachmat/rubinius,benlovell/rubinius,Wirachmat/rubinius,ngpestelos/rubinius,digitalextremist/rubinius,digitalextremist/rubinius,mlarraz/rubinius,ngpestelos/rubinius,jemc/rubinius,mlarraz/rubinius,digitalextremist/rubinius,Wirachmat/rubinius,kachick/rubinius,dblock/rubinius,Azizou/rubinius,sferik/rubinius,jsyeo/rubinius,Azizou/rubinius,ngpestelos/rubinius,dblock/rubinius,heftig/rubinius,heftig/rubinius,pH14/rubinius,ruipserra/rubinius,jsyeo/rubinius,mlarraz/rubinius,ruipserra/rubinius,benlovell/rubinius,dblock/rubinius,jemc/rubinius,dblock/rubinius,ruipserra/rubinius,kachick/rubinius,Wirachmat/rubinius,benlovell/rubinius,kachick/rubinius,sferik/rubinius,ngpestelos/rubinius,mlarraz/rubinius,benlovell/rubinius,kachick/rubinius,Azizou/rubinius,pH14/rubinius,Azizou/rubinius,sferik/rubinius,jsyeo/rubinius,jemc/rubinius,digitalextremist/rubinius,heftig/rubinius,jsyeo/rubinius,kachick/rubinius,kachick/rubinius,heftig/rubinius,digitalextremist/rubinius,ngpestelos/rubinius,heftig/rubinius,heftig/rubinius,Azizou/rubinius,dblock/rubinius,jemc/rubinius,jsyeo/rubinius,pH14/rubinius,sferik/rubinius,mlarraz/rubinius,pH14/rubinius,ngpestelos/rubinius,jemc/rubinius,benlovell/rubinius,sferik/rubinius,kachick/rubinius,ruipserra/rubinius,benlovell/rubinius,jsyeo/rubinius,ruipserra/rubinius,digitalextremist/rubinius,dblock/rubinius,Wirachmat/rubinius,Wirachmat/rubinius,mlarraz/rubinius,ruipserra/rubinius,mlarraz/rubinius,jemc/rubinius,jsyeo/rubinius,ruipserra/rubinius