- formatting implemented for floating point types

- fixed some bugs with width and precision specifiers:
    * Evaluation order of nested replacement fields

test/printing.h

@@ -19,6 +19,7 @@
 #ifndef FENNEC_TEST_PRINTING_H
 #define FENNEC_TEST_PRINTING_H
 
+#include <iomanip>
 #include <iostream>
 
 #include <fennec/filesystem/path.h>
@@ -63,17 +64,17 @@ inline std::ostream& operator<<(std::ostream& os, const quaternion<ScalarT>& q)
 
 // Helper for printing strings
 inline std::ostream& operator<<(std::ostream& os, const cstring& str) {
-	return os << str.data();
+	return os << std::quoted(str.data());
 }
 
 // Helper for printing strings
 inline std::ostream& operator<<(std::ostream& os, const string& str) {
-	return os << str.cstr();
+	return os << std::quoted(str.cstr());
 }
 
 // Helper for printing strings
 inline std::ostream& operator<<(std::ostream& os, const path& str) {
-	return os << str.str();
+	return os << std::quoted(str.cstr());
 }
 
 // Helper for printing types