arg line missing when doing C-h f on sort-regexp-fields

[Jonas Jarnestrom]

This bug report will be sent to the Free Software Foundation,
 not to your local site managers!!
Please write in English, because the Emacs maintainers do not have
translators to read other languages for them.

In GNU Emacs 20.6.1 (sparc-sun-solaris2.6, X toolkit)
 of Fri Mar  3 2000 on iris
configured using `configure  --with-gcc --with-pop --with-x-toolkit=lucid 
--bindir=/usr/local/bin --libexecdir=/usr/local/libexec'

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

I have a code chunk like this:

    (sort-regexp-fields nil 
                        (cond ((numberp comment)

I am in Emacs-lisp mode, put point on sort-regexp-fields and hit C-h f
(describe-function), which gets me:


"sort-regexp-fields is an interactive autoloaded Lisp function in `sort'.

Sort the region lexicographically as specified by RECORD-REGEXP and KEY.
RECORD-REGEXP specifies the textual units which should be sorted."
<snipped>

i.e. the second line normally displaying the arg list is missing.
In this case that is extra bad 'cause arg1,arg4-5 are not 
mentioned at all in the rest of the text.

A minut ago when I used apropos-command to get a list of sort
commands, and then clicked on the 'Command' keyword, I did get the
second line with a full arg spec. But when I was repeating that
procedure the arg line was gone again. A little confusing.

Thanks to the resulting poor on-line doc, I was unable to figure out
how sort-regexp-field was to be called, but had to resort to looking up
the source. (trust the force, read the source :-)