I was just looking if there is any way to pass multi line argument value instead of using \n or \ character at end of each line which are not handy and requires to pass/edit data manually. I have found such here-* syntactic sugar in BASH
./example --test << EOF
multi line content goes here …
EOF
Notice that here we have only prefix --test << EOF and suffix EOF for such value i.e. value is not changed and it could be just copied. Single line have only prefix (--test), but it’s much easier that other solutions. Simple example of use case here is multi line JSON parsing, so end-user could use such option by simply copying JSON data - without any need to replace new line with \n or adding \ at end of each data line (just imagine huge prettified JSON).
