multiline script is broken

example

test:
  script:
  - |
    cat <<-EOF >> config
    first
    second
    EOF

The config file:

echo $'\x1b[32;1m$ first\x1b[0;m'
first
echo $'\x1b[32;1m$ second\x1b[0;m'
second
echo $'\x1b[32;1m$ EOF\x1b[0;m'