blantant test code removal well this is embarassing, VS didn't recompile it, so I didn't notice the mistake

Utilities/StrFmt.h

@@ -15,7 +15,7 @@ namespace fmt{
 
 	struct empty_t{};
 
-	//static const string placeholder = "???";
+	extern const string placeholder;
 
 	// write `fmt` from `pos` to the first occurence of `fmt::placeholder` to
 	// the stream `os`. Then write `arg` to to the stream. If there's no
@@ -24,7 +24,7 @@ namespace fmt{
 	template<typename T>
 	empty_t write(const string &fmt, ostream &os, string::size_type &pos, T &&arg)
 	{
-		string::size_type ins = fmt.find(/*placeholder*/"???", pos);
+		string::size_type ins = fmt.find(placeholder, pos);
 
 		if (ins == string::npos)
 		{