Fix fstrings

Some Python strings were intended as f-strings but the `f` was missing.

Author: benoit-nexthop

fboss/oss/scripts/run_scripts/qsfp_service_utils.py

@@ -83,17 +83,17 @@ def _setup_qsfp_service(
     if platform_mapping_override_path:
         if not os.path.exists(platform_mapping_override_path):
             raise Exception(
-                "platform_mapping override path: {platform_mapping_override_path} does not exist"
+                f"platform_mapping override path: {platform_mapping_override_path} does not exist"
             )
         extra_args += (
             f"{_PLATFORM_MAPPING_OVERRIDE_PATH_ARG} {platform_mapping_override_path}"
         )
     if bsp_platform_mapping_override_path:
         if not os.path.exists(bsp_platform_mapping_override_path):
             raise Exception(
-                "bsp_platform_mapping override path: {bsp_platform_mapping_override_path} does not exist"
+                f"bsp_platform_mapping override path: {bsp_platform_mapping_override_path} does not exist"
             )
-        extra_args += f"{_BSP_PLATFORM_MAPPING_OVERRIDE_PATH_ARG} {bsp_platform_mapping_override_path}"
+        extra_args += f" {_BSP_PLATFORM_MAPPING_OVERRIDE_PATH_ARG} {bsp_platform_mapping_override_path}"
     qsfp_service_cmd = (
         f"{qsfp_service_bin_path} --qsfp-config {qsfp_service_config_path} {extra_args}"
     )