The following two errors are in the Emacs info manual for Emacs 28.1 (C-h r):
1. In "(emacs) Gnus Group Buffer", the description for the key   ‘u’ reads:
      Toggle the subscription status of the group      (‘gnus-group-toggle-subscription’) on the current line.      Invoking this on a killed or zombie group turns it into      an unsubscribed group.
   But C-h c for the key ‘u’ in the GNUS *Group* buffer reports:
      u runs the command gnus-group-toggle-subscription-at-point
   Likewise, C-h k for the key ‘u’ reports:
      u runs the command gnus-group-toggle-subscription-at-point      (found in gnus-group-mode-map), which is an interactive      native compiled Lisp function in ‘gnus-group.el’.
 So, the trailing text "-at-point" is missing from the function name bound to the ‘u’ key in the Emacs info manual and needs to be added to the function name in the description in the info manual.
   (Note: Capital ‘U’ in the GNUS *Group* buffer is mapped   to ‘gnus-group-toggle-subscription’.)

2. In "(emacs) Gnus Summary Buffer", the key sequence for   the command ‘gnus-summary-search-article-forward’ is   incorrect.  The info manual reads:
      ‘M-s REGEXP <RET>’           Search forward for articles containing a match for           REGEXP (‘gnus-summary-search-article-forward’).
   But C-h c M-s M-s reports:
      M-s M-s runs the command gnus-summary-search-article-forward
   Likewise, the Gnus menu for the GNUS *Summary* buffer   lists:
      Search articles forward...  M-s M-s
   So, an additional M-s is needed in the Emacs info manual   for the key sequence for searching forward in articles:
      ‘M-s M-s REGEXP <RET>’
(End of error report.)