is important, we’ll refer to the Emacs interface as
*notmuch-emacs*.
-Notmuch-emacs is highly customizable via the the Emacs customization
+Notmuch-emacs is highly customizable via the Emacs customization
framework (or just by setting the appropriate variables). We try to
point out relevant variables in this manual, but in order to avoid
duplication of information, you can usually find the most detailed
Dealing with duplicates
-----------------------
-If there are are multiple files with the same :mailheader:`Message-ID`
+If there are multiple files with the same :mailheader:`Message-ID`
(see :any:`duplicate-files`), then :any:`notmuch-show` displays the
number of duplicates and identifies the current duplicate. In the
following example duplicate 3 of 5 is displayed.
notmuch-tag-undo
----------------
-Each notmuch buffer supporting tagging operations (i.e buffers in
+Each notmuch buffer supporting tagging operations (i.e. buffers in
:any:`notmuch-show`, :any:`notmuch-search`, :any:`notmuch-tree`, and
:any:`notmuch-unthreaded` mode) keeps a local stack of tagging
operations. These can be undone via :any:`notmuch-tag-undo`. By default