tried to improve the mlog output string handling

src/tests/fio_test/fio_test.cpp

@@ -12,19 +12,20 @@ int main()
   }
 
   const int prec=6;
-  double val = 0.258466548916354835498465;
+  double val1 = 0.258466548916354835498465;
+  double val2 = 0.000258466548916354835498465;
 
   f.width(9);
   f.precision(prec);
-  f << left << val;
+  f << left << val1;
   f << " ";
   f.width(9);
   f.precision(prec);
-  f << left << val;
+  f << left << val2;
   f << " ";
   f.width(9);
   f.precision(prec);
-  f << left << val;
+  f << left << val1;
 
   f.close();
 

src/tests/fio_test/fio_test.txt

@@ -1 +0,0 @@
-0.258467  0.258467  0.258467