+Changes to tagging interface
+
+ The user-facing tagging functions in the Emacs interface have been
+ normalized across all notmuch modes. The tagging functions are now
+ 'notmuch-search-tag' in search-mode, and 'notmuch-show-tag' in
+ show-mode. They accept a string representing a single tag change,
+ or a list of tag changes. See 'M-x describe-function notmuch-tag'
+ for more information.
+
+ NOTE: This breaks compatibility with old tagging functions, so user
+ may need to update in custom configurations.
+