simplify format key

pub/lib/file_in.cpp

@@ -82,7 +82,7 @@ void NFileIn::Load_yda(std::ifstream& FS, string fnam)
     int version;
     if      ( s == "frida/y08 for yaml1" )
         version = 1;
-    else if ( s == "frida/y15 for yaml1.2" )
+    else if ( s == "yaml/frida 2.0" )
         version = 2;
     else
         throw "unknown data format '" + s + "'";

pub/lib/file_out.cpp

@@ -90,7 +90,7 @@ void NFileOut::save_yda( std::ofstream& ofs, POlo f )
     out << YAML::BeginMap;
 
     out << YAML::Key << "Meta" << YAML::Value << YAML::BeginMap;
-    out << YAML::Key << "format" << YAML::Value << "frida/y15 for yaml1.2";
+    out << YAML::Key << "format" << YAML::Value << "yaml/frida 2.0";
     out << YAML::Key << "type" << YAML::Value << ( fd ? "generic tabular data" : "frida2 curve" );
     out << YAML::EndMap;