Expand a comment about overstriked underlining
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sdn.cpp
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sdn.cpp
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@ -243,7 +243,8 @@ fun capitalize (const string &s) -> string {
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return result;
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}
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/// Underlining for teletypes, also imitated in more(1) and less(1)
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/// Underlining for teletypes (also called overstriking),
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/// also imitated in more(1) and less(1)
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fun underline (const string& s) -> string {
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string result;
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for (auto c : s)
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