tsoa: @ symbol in @example for types causes Swagger generation problems

The below code causes and error in swagger generation

/**
 * A request body object for userId
 * @example
 * {"userId":"mike.user@bigcompany.com"}
 * 
 */ 
export interface UserIdObject { userId: string };

removing the @ removes the issue interestingly putting back quotes around the @ (as in `@`) removes the generation error, but also leaves the backquotes in the example

Sorting

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Expected Behavior

the Example tag in the generated swagger should be able to include the @ sign