Mage: Change Y/N into PAR file to O/N (as french).

src/Solver/Mage.py

@@ -503,6 +503,9 @@ class Mage8(Mage):
                 if name in ["command_line_arguments"]:
                     continue
 
+                if name is "mage_compute_reach_volume_balance":
+                    value = "O" if value == "y" else "N"
+
                 f.write(f"{name} {value}\n")
 
         return files