How to output a multiline string in Bash?

Question

How can I output a multipline string in Bash without using multiple echo calls like so:

echo \"usage: up [--level | -n ][--help][--version         


        

Answer 1

Also with indented source code you can use <<- (with a trailing dash) to ignore leading tabs (but not leading spaces).

For example this:

if [ some test ]; then
    cat <<- xx
        line1
        line2
xx
fi

Outputs indented text without the leading whitespace:

line1
line2