We may be overthinking this. ikegami
's solution should be fine. The exception is that ancient Mac which uses <CR> instead of <CR><LF> or <LF> for line endings. One of my users was using an old Mac to edit one of my config files and reported that my config file "didn't work". I talked with this guy and told him to set his text editor to "write DOS compatible files" and that ended the problem. Modern Macs use <LF>. Unless there is a specific strange requirement, writing code to handle ancient Mac is not worth the effort.
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