Improper `@example` parsing when an at-sign `@` is used in the code-block.

[JHawkley]

Noticed an issue with the @example JSDoc tag when the example happens to use an @ sign, such as for an email address (my case).

• VSCode Version: 1.45.1
• OS Version: Ubuntu 20.04

Steps to Reproduce:

1. Make an @example JSDoc tag similar to the below:

/**
 * @example Example Output
 * {
 *   name: "Testy McTest",
 *   email: "testy.mctest@not_an_email.com"
 *   gender: "ambiguous"
 * }
 */
const theProfile = getProfile();

2. Observe the tooltip for theProfile. VSCode parses the @not_an_email as a JSDoc tag, breaking the code formatting. It will do this even if the example code is fenced in back-ticks, with slightly different output.

Does this issue occur when all extensions are disabled?: N/A

[mjbvz]

Potential fixes:

• Require the @ always be prefixed by a whitespace, {, or the start of the line (this would not fix other cases such as email: "a @ b"

• Only parse inline jsdoc tags if they are known, such as @link

[MartinJohns]

Duplicate of #35310.

[sandersn]

Duplicate of #39371, and fixed in #42364.