Fixed double slashes

Author: calebbiggers

scripts/perf_format_converter.py

@@ -466,7 +466,7 @@ def translate_metric_event(self, event_name, platform):
                     if translated_option is not None:
                         translated_options.append(translated_option)
                 if prefix:
-                    translated_event = f"{prefix}@{base_event.upper()}\\,{"\\\\,".join(translated_options)}@"
+                    translated_event = f"{prefix}@{base_event.upper()}\\,{"\\,".join(translated_options)}@"
                 else:
                     translated_event = f"{base_event.upper()}@{"\\,".join(translated_options)}@"
                     print("!!!!!!!!!NO PREFIX. SOMETHING IS WRONG!!!!!!!!!!!!!")