Do some NEWS tagging

etc/NEWS

@@ -1201,6 +1201,7 @@ a weight of 'normal' and the font doesn't have this weight, Emacs
 won't find the font spec.  In these cases, replacing ":weight 'normal"
 with ":weight 'medium" should fix the issue.
 
+---
 ** Keymap descriptions have changed.
 'help--describe-command', 'C-h b' and associated functions that output
 keymap descriptions have changed.  In particular, prefix commands are
@@ -1267,6 +1268,7 @@ Use 'exif-parse-file' and 'exif-field' instead.
 ** 'insert-directory' alternatives should not change the free disk space line.
 This change is now applied in 'dired-insert-directory'.
 
+---
 ** Some functions and variables obsolete since Emacs 23 have been removed:
 'find-emacs-lisp-shadows', 'newsticker-cache-filename',
 'unify-8859-on-decoding-mode', 'unify-8859-on-encoding-mode',
@@ -1587,6 +1589,7 @@ values passed as a single token, such as '-oVALUE' or '--option=VALUE'.
 
 ** XDG support
 
+---
 *** New function 'xdg-state-home' returns 'XDG_STATE_HOME' environment variable.
 This new location, introduced in the XDG Base Directory Specification
 version 0.8 (8th May 2021), "contains state data that should persist
@@ -1749,6 +1752,7 @@ that should be displayed, and the xwidget that asked to display it.
 This function is used to control where and if an xwidget stores
 cookies set by web pages on disk.
 
+---
 ** New variable 'help-buffer-under-preparation'.
 This variable is bound to t during the preparation of a "*Help*" buffer.