Lines usually end with a newline character. So a text file usually ends with a newline character. Sometimes you might want to add or remove this newline character. You can use these functions to help you.

## Add a trailing newline to the end of a buffer

    # Add a trailing newline to the end of a buffer.
    # usage: <at
    # This function uses the label z.
    function:at {
    $X
    kz
    s/$/\n\n/f
    'z+X
    ;g/^$/fd
    }

## Remove a trailing newline from the end of a buffer

    # Remove a trailing newline from the end of a buffer.
    # usage: <rt
    function:rt {
    db0
    H-
    ebvar+
    $X
    .v/^$/fr !echo -n '.
    if(*) {
    -d
    }
    }