Function isBreakableAfter

extlibs/catch/include/catch/catch.hpp:8167–8170

	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;