add check for commands from string

Author: james-bruten-mo

lfric_macros/apply_macros.py

@@ -764,10 +764,12 @@ def combine_macros(self, import_order):
                 and "commands" in self.target_macros[meta_import]
             ):
                 # Add a comment labelling where these commands came from
-                full_command += (
-                    "        # Commands From: "
-                    f"{self.parse_application_section(meta_import)}\n"
-                )
+                # Check the comment hasn't already been added
+                if not re.search(r"Commands From: \w+", self.target_macros[meta_import]["commands"]):
+                    full_command += (
+                        "        # Commands From: "
+                        f"{self.parse_application_section(meta_import)}\n"
+                    )
                 if self.target_macros[meta_import]["commands"].strip("\n"):
                     full_command += self.target_macros[meta_import]["commands"] + "\n"
                 else: