Function write_table_header

smallthinker/examples/gen-docs/gen-docs.cpp:9–12

// Export usage message (-h) to markdown format

static void write_table_header(std::ofstream & file) {
    file << "| Argument | Explanation |\n";
    file << "| -------- | ----------- |\n";
}

static void write_table_entry(std::ofstream & file, const common_arg & opt) {
    file << "| `";