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when I enter printf "\e[4m%s\e[0m\n" TESTING into iterm or osx terminal, testing returns underlined.

Are there any terminals (mac or linux) that would support printf "\e[53m%s\e[0m\n" TESTING?

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Where did you get the \e[53m sequence from? Is it documented anywhere? – grawity Oct 26 '12 at 18:10
    
@grawity I found it here: en.wikipedia.org/wiki/ANSI_escape_code#CSI_codes Which is far from an ideal reference. – jtmkrueger Oct 26 '12 at 18:25

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