Function valid_alias_name_string

include/CLI/StringTools.hpp:167–169

Verify an app name

/// Verify an app name
inline bool valid_alias_name_string(const std::string &str) {
    return ((str.find_first_of('\n') == std::string::npos) && (str.find_first_of('\0') == std::string::npos));
}

/// check if a string is a container segment separator (empty or "%%")
inline bool is_separator(const std::string &str) {