Testing if-then-else constructs

  $ cat > test.sh <<EOF
  > if echo hello
  > then
  >   echo world
  > fi
  > EOF

  $ msh test.sh
  hello
  world

  $ cat > test.sh <<EOF
  > if ls --malformed-option 2>1 > /dev/null
  > then
  >   echo world
  > else
  >   echo goodbye
  > fi
  > EOF

  $ sh test.sh
  goodbye
  $ msh test.sh
  goodbye