Minor changes to follow C++ Format's coding conventions

biicode/samples/basic.cc

@@ -0,0 +1,17 @@
+#include "vitaut/cppformat/format.h"
+
+class Date {
+  int year_, month_, day_;
+ public:
+  Date(int year, int month, int day) : year_(year), month_(month), day_(day) {}
+
+  friend std::ostream &operator<<(std::ostream &os, const Date &d) {
+    return os << d.year_ << '-' << d.month_ << '-' << d.day_;
+  }
+};
+
+int main(int argc, char *argv[]){
+  std::string s = fmt::format("The date is {}", Date(2012, 12, 9));
+  fmt::print("Hello, {}!", "world");  // uses Python-like format string syntax
+  fmt::printf("\n%s", s); // uses printf format string syntax
+}