Fix gnus-group-describe-all-groups (bug#35233)

This fixes oversights from
2018-04-26T16:26:27-07:00!eric@ericabrahamsen.net and
2016-02-13T18:45:11+11:00!larsi@gnus.org.
* lisp/gnus/gnus-group.el (gnus-group-describe-all-groups): Insert
group name and description instead of group name twice.  Do not pass
a hash-table to intern.  Call sort with correct number of arguments.
1 job for master in 39 minutes and 13 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
failed #1345
test-all

00:39:13

 
Name Stage Failure
failed
test-all Test
Makefile:313: recipe for target 'check-doit' failed
make[2]: *** [check-doit] Error 1
make[2]: Leaving directory '/builds/emacs/emacs/test'
Makefile:288: recipe for target 'check-expensive' failed
make[1]: *** [check-expensive] Error 2
make[1]: Leaving directory '/builds/emacs/emacs/test'
Makefile:962: recipe for target 'check-expensive' failed
make: *** [check-expensive] Error 2
ERROR: Job failed: exit code 1