CoffeeScript compiler removes explicit parentheses making casts difficult in JSDoc

https://www.typescriptlang.org/docs/handbook/jsdoc-supported-types.html#casts

```coffee
b = ###* @type {B} ### (a)
```

Actual:
```js
// Generated by CoffeeScript 2.6.1
var b;

b = /** @type {B} */a;
```

Expected:
```js
// Generated by CoffeeScript 2.6.1
var b;

b = /** @type {B} */ (a);
```

Start by compiling the CoffeeScript reproduction containing the JSDoc @type cast and explicit parentheses, then compare the generated JavaScript with the expected output. Trace the compiler handling of JSDoc comments and parenthesized expressions; done means the parentheses are preserved for this case without regressing ordinary parenthesis removal.

Written by the indexing model from the issue text.