`declare -f` doesn't work properly with some function defs

`declare -f` does not produce a function that is syntactically correct if it has a particular usage of heredoc and `&&`.
Example:
```bash
a() {
echo hi &&
cat >/dev/null <<-EOF &&
texttexttext
EOF
echo bye
}
```
with `declare -f` the definition will become
```bash
a ()
{
echo hi && cat > /dev/null <<-EOF
texttexttext
EOF
&& echo bye
}
```
which will trigger a syntax error if parsed as shell script (notice the change of position of `&&`).

It seems that the first command and the third command are necessary for this behavior.