Function isBreakableAfter

unittests/catch.hpp:5274–5277

        return chars.find( c ) != std::string::npos;
    }
    inline auto isBreakableAfter( char c ) -> bool {
        static std::string chars = "])}>.,:;*+-=&/\\";
        return chars.find( c ) != std::string::npos;
    }

    class Columns;