>
> A minor stylistic comments:
>
>> +In subr.el, the definition of lambda is as below, and the (fn) facility
>       ^^^^^^^                    ^^^^^^
> File names should have the @file markup, and symbols and other code
> fragments (like "&rest" and "defun") should have the @code markup.

Added @file and @code for all applicable markups.


In summary, the new compact text should help new contributors understand how the
(fn) magic can be used.

If it's not good to install, please let me know what to do.