Code in block doc comments are not formatted

[magiclen]

With format_code_in_doc_comments = true, rustfmt 1.6.0-nightly can format code in line doc comments, but code in block doc comments cannot be formatted.

/// ```rust
/// println!("hello"); // formatted
/// ```

/**
```rust
   println!("hello");          // not formatted
```
*/

fn f() {}

[ytmimi]

Thanks for reaching out! If you write the doc comment as follows then it formats as expected.

/**
 * ```rust
 *    println!("hello");          // not formatted
 * ```
 */
fn f() {}

[ytmimi]

This seems like a limitation of how rustfmt handles block doc comments where lines don't start with leading *. linking the tracking issue for format_code_in_doc_comments #3348