Update opensquirrel/writer/writer.py

Update simplest circuit string representation according to feedback

Co-authored-by: Roberto Turrado Camblor <[email protected]>

opensquirrel/writer/writer.py

@@ -16,9 +16,11 @@ def __init__(self, register_manager: RegisterManager) -> None:
 
         bit_register_size = self.register_manager.get_bit_register_size()
         bit_register_name = self.register_manager.get_bit_register_name()
-        self.output = "version 3.0\n".format(
-            "\n{}\n{}\n"+f"qubit[{qubit_register_size}] {qubit_register_name}" if qubit_register_size > 0 else "",
-            f"bit[{bit_register_size}] {bit_register_name}\n" if bit_register_size > 0 else "",
+        self.output = "version 3.0{}{}{}{}\n".format(
+            "\n\n" if qubit_register_size > 0 or bit_register_size > 0,
+            f"qubit[{qubit_register_size}] {qubit_register_name}" if qubit_register_size > 0 else "",
+            "\n" if qubit_register_size > 0 and bit_register_size > 0 else "",
+            f"bit[{bit_register_size}] {bit_register_name}" if bit_register_size > 0 else "",
         )
 
     def visit_bit(self, bit: Bit) -> str: