úΉ NoneAppend a showable value to a  in a smart way. In  particular, do not  a , as this encloses it in  "quotes"6. So, depending on the type of the second parameter,  ' is equivalent to one of the following    x ^-^ y = x ++ y  x ^-^ y = x ++ show y "For all intents and purposes, the  type-class is a  wrapper around ', so any type that has an instance for   will also have an instance for Interpol. Append a showable value to a  in a smart way. In  particular, do not  a , as this encloses it in  "quotes"6. So, depending on the type of the second parameter,  ' is equivalent to one of the following    x ^-^ y = x ++ y  x ^-^ y = x ++ show y "For all intents and purposes, the  type-class is a  wrapper around ', so any type that has an instance for   will also have an instance for Interpol.       interpol-0.2.2 Text.InterpolToString^-^interpolbaseGHC.BaseStringGHC.ShowshowShow $fToStringa$fToStringChar $fToString[]