Fixing typos.

samples/exiv2json.cpp

@@ -238,8 +238,8 @@ void fileSystemPush(const char* path,Jzon::Node& nfs)
 int main(int argc, char* const argv[])
 try {
     if (argc < 2 || argc > 3) {
-        std::cout << "Usage: " << argv[0] << " [-option] file\n";
-        std::cout << "Option: all | exif | iptc | xmp | filesystem" << argv[0] << " [option] file\n";
+        std::cout << "Usage: " << argv[0] << " [-option] file"       << std::endl;
+        std::cout << "Option: all | exif | iptc | xmp | filesystem"  << std::endl;
         return 1;
     }
     const char* path   = argv[argc-1];