checkdoc-defun-info is a compiled Lisp function in `
Return a list of details about the current sexp.
It is a list of the form:
(NAME VARIABLE INTERACTIVE NODOCPARAMS PARAMETERS ...)
where NAME is the name, VARIABLE is t if this is a `defvar',
INTERACTIVE is nil if this is not an interactive function, otherwise
it is the position of the `interactive' call, and PARAMETERS is a
string which is the name of each variable in the function's argument
list. The NODOCPARAMS is a sublist of parameters specified by a checkdoc
comment for a given defun. If the first element is not a string, then
the token checkdoc-order: <TOKEN> exists, and TOKEN is a symbol read
from the comment.