"Add unsafe block" produces wrong syntax

[lnicola]

    unsafe fn realloc(&self, ptr: *mut u8, _layout: Layout, new_size: usize) -> *mut u8 {
        { realloc(ptr.cast::<c_void>(), new_size) } as *mut u8
    }

// -> 

    unsafe fn realloc(&self, ptr: *mut u8, _layout: Layout, new_size: usize) -> *mut u8 {
        unsafe { realloc(ptr.cast::<c_void>(), new_size) } as *mut u8
    }

// should be

    unsafe fn realloc(&self, ptr: *mut u8, _layout: Layout, new_size: usize) -> *mut u8 {
        (unsafe { realloc(ptr.cast::<c_void>(), new_size) }) as *mut u8
    }

unsafe { f() } + 0 probably has the same issue.