message: Handle backslashes in MongoDB export format
  Fixes
diff: @@ -360,7 +360,9 @@ function formatQuery(ruleGroup: RuleGroupTypeAny, options: FormatQueryOptions |
  .filter(Boolean)
  .join(',');
  - return expression ? `${combinator}:[${expression}]` : fallbackExpression;
  + return expression
  + ? `${combinator}:[${expression}]`.replaceAll('\\', '\\\\')
  + : fallbackExpression;
  };
  const rgStandard = 'combinator' in ruleGroup ? ruleGroup : convertFromIC(ruleGroup);
  