One other idea to handle this is at configuration phase. You can test
more and less with every option used on every platform for each of them
respectively. Test could run the command with the option, and check if
it passes the given escape sequence. This would be reflected in config.h
defines like this: MORE_DASH_R_WORKS This would be very accurate.
Not sure if this is an overkill for this issue.
Yuri
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