Quick info for parameter redundantly shows @param tag

TypeScript Version: 3.1.0-dev.20180830

Code

/**
 * @param p
 * Once upon a time there was a parameter named p.
 * P lived in a function called f.
 * Then a big bad wolf came and blew f down.
 */
function f(p: number): void {}

Expected behavior:

Documentation for p is shown only once.

Actual behavior:

Documentation is shown twice -- once as the normal documentation (good), once as documentation for the @param tag which is redundant since we took the documentation from there. This doubles the size of the quick info.

Start with the TypeScript 3.1.0-dev.20180830 reproduction: inspect quick info for parameter p when its JSDoc contains an @param tag. Confirm the current output repeats the parameter documentation, then verify that quick info presents the documentation only once without changing other JSDoc behavior.