JSDoc tag descriptions lose their indentation.

[jespertheend]

Does this issue occur when all extensions are disabled?: Yes

Version: 1.76.2
Commit: ee2b180d582a7f601fa6ecfdad8d9fd269ab1884
Date: 2023-03-14T17:47:26.641Z
Browser: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36

Steps to Reproduce:

1. Open vscode.dev
2. Create a new file and set language mode to JavaScript
3. Paste the following:

/**
 * This works
 * ```
 * some
 *   indentations
 *     and
 *       some
 *         more
 * ```
 */
function foo() {}

/**
 * @typedef MyObj
 * @property {number} foo This doesn't
 * ```
 * some
 *   indentations
 *     and
 *       some
 *         more
 * ```
 */

const obj = /** @type {MyObj} */ (null);

obj.foo

4. Hover over foo on the last line.

When hovering over foo() it works fine:

But on obj.foo the identation of the code block is lost:

[mjbvz]

@sandersn Looks like typescript is dropping the indentation in the second case:

"documentation": [
        {
            "text": "This doesn't\n```\nsome\nindentations\nand\nsome\nmore\n```",
            "kind": "text"
        }
    ],

[jespertheend]

Seems like the issue lies here:

TypeScript/src/compiler/parser.ts

Lines 8910 to 8913 in 27d3454

	if (margin !== undefined && indent + whitespace.length > margin) {
	comments.push(whitespace.slice(margin - indent));
	state = JSDocState.SavingComments;
	}

When parsing jsdoc comments inside parseJSDocCommentWorker() the margin is 3, so the indentation ends up being fine. But when similar steps are performed inside parseTagComments(), the margin ends up being 26 in my case.
So it seems like the margin of the first line is being used, which is usually pretty long because it contains the @param/@property tags and their name and type.

And this playground example, confirms this behaviour.