[Help-bash] How to let a command take multiple here-doc?

[Peng Yu]

Hi,

The following bash code uses cat twice. Because one uses EOF the other
uses 'EOF', they can not readily be combined.

x='Hello World!'
cat <<EOF
$x
EOF
cat <<'EOF'
$x
EOF

I can't find that that bash support multiple here-docs for the same
command. Is it so?

-- 
Regards,
Peng