style: apply ruff format to all source files

redmine_reporter/yaml_config.py

@@ -21,7 +21,9 @@ def resolve_env_vars(value: str) -> str:
         var_name = match.group(1)
         env_value = os.environ.get(var_name)
         if env_value is None:
-            logger.warning("Environment variable %s is not set, using empty string", var_name)
+            logger.warning(
+                "Environment variable %s is not set, using empty string", var_name
+            )
             return ""
         return env_value
 
@@ -182,5 +184,7 @@ def save_period_to_config(
 
     ensure_config_dir(path.parent)
     with open(path, "w", encoding="utf-8") as fh:
-        yaml.dump(raw, fh, allow_unicode=True, default_flow_style=False, sort_keys=False)
+        yaml.dump(
+            raw, fh, allow_unicode=True, default_flow_style=False, sort_keys=False
+        )
     path.chmod(0o600)