Fix typos

* org.el (org-get-agenda-file-buffer): Fix docstring.

* ox-icalendar.el (org-icalendar-use-deadline): Fix typo in docstring.

lisp/org.el

@@ -18158,8 +18158,9 @@ Optional argument FILE means use this file instead of the current."
        (t (user-error "Abort"))))))
 
 (defun org-get-agenda-file-buffer (file)
-  "Get a buffer visiting FILE.  If the buffer needs to be created, add
-it to the list of buffers which might be released later."
+  "Get an agenda buffer visiting FILE.
+If the buffer needs to be created, add it to the list of buffers
+which might be released later."
   (let ((buf (org-find-base-buffer-visiting file)))
     (if buf
 	buf ; just return it

lisp/ox-icalendar.el

@@ -85,10 +85,11 @@ keyword."
 (defcustom org-icalendar-use-deadline '(event-if-not-todo todo-due)
   "Contexts where iCalendar export should use a deadline time stamp.
 
-This is a list with several symbols in it.  Valid symbol are:
+This is a list with possibly several symbols in it.  Valid symbols are:
+
 `event-if-todo'       Deadlines in TODO entries become calendar events.
 `event-if-not-todo'   Deadlines in non-TODO entries become calendar events.
-`todo-due'            Use deadlines in TODO entries as due-dates"
+`todo-due'            Use deadlines in TODO entries as due-dates."
   :group 'org-export-icalendar
   :type '(set :greedy t
 	      (const :tag "Deadlines in non-TODO entries become events"