diff --git a/emacs/notmuch-show.el b/emacs/notmuch-show.el
index 10fc8721..2ed221ae 100644
--- a/emacs/notmuch-show.el
+++ b/emacs/notmuch-show.el
@@ -1275,46 +1275,46 @@ reset based on the original query."
 (fset 'notmuch-show-part-map notmuch-show-part-map)
 
 (defvar notmuch-show-mode-map
-      (let ((map (make-sparse-keymap)))
-	(set-keymap-parent map notmuch-common-keymap)
-	(define-key map "Z" 'notmuch-tree-from-show-current-query)
-	(define-key map (kbd "<C-tab>") 'widget-backward)
-	(define-key map (kbd "M-TAB") 'notmuch-show-previous-button)
-	(define-key map (kbd "<backtab>") 'notmuch-show-previous-button)
-	(define-key map (kbd "TAB") 'notmuch-show-next-button)
-	(define-key map "f" 'notmuch-show-forward-message)
-	(define-key map "r" 'notmuch-show-reply-sender)
-	(define-key map "R" 'notmuch-show-reply)
-	(define-key map "|" 'notmuch-show-pipe-message)
-	(define-key map "w" 'notmuch-show-save-attachments)
-	(define-key map "V" 'notmuch-show-view-raw-message)
-	(define-key map "c" 'notmuch-show-stash-map)
-	(define-key map "h" 'notmuch-show-toggle-visibility-headers)
-	(define-key map "*" 'notmuch-show-tag-all)
-	(define-key map "-" 'notmuch-show-remove-tag)
-	(define-key map "+" 'notmuch-show-add-tag)
-	(define-key map "X" 'notmuch-show-archive-thread-then-exit)
-	(define-key map "x" 'notmuch-show-archive-message-then-next-or-exit)
-	(define-key map "A" 'notmuch-show-archive-thread-then-next)
-	(define-key map "a" 'notmuch-show-archive-message-then-next-or-next-thread)
-	(define-key map "N" 'notmuch-show-next-message)
-	(define-key map "P" 'notmuch-show-previous-message)
-	(define-key map "n" 'notmuch-show-next-open-message)
-	(define-key map "p" 'notmuch-show-previous-open-message)
-	(define-key map (kbd "M-n") 'notmuch-show-next-thread-show)
-	(define-key map (kbd "M-p") 'notmuch-show-previous-thread-show)
-	(define-key map (kbd "DEL") 'notmuch-show-rewind)
-	(define-key map " " 'notmuch-show-advance-and-archive)
-	(define-key map (kbd "M-RET") 'notmuch-show-open-or-close-all)
-	(define-key map (kbd "RET") 'notmuch-show-toggle-message)
-	(define-key map "#" 'notmuch-show-print-message)
-	(define-key map "!" 'notmuch-show-toggle-elide-non-matching)
-	(define-key map "$" 'notmuch-show-toggle-process-crypto)
-	(define-key map "<" 'notmuch-show-toggle-thread-indentation)
-	(define-key map "t" 'toggle-truncate-lines)
-	(define-key map "." 'notmuch-show-part-map)
-	map)
-      "Keymap for \"notmuch show\" buffers.")
+  (let ((map (make-sparse-keymap)))
+    (set-keymap-parent map notmuch-common-keymap)
+    (define-key map "Z" 'notmuch-tree-from-show-current-query)
+    (define-key map (kbd "<C-tab>") 'widget-backward)
+    (define-key map (kbd "M-TAB") 'notmuch-show-previous-button)
+    (define-key map (kbd "<backtab>") 'notmuch-show-previous-button)
+    (define-key map (kbd "TAB") 'notmuch-show-next-button)
+    (define-key map "f" 'notmuch-show-forward-message)
+    (define-key map "r" 'notmuch-show-reply-sender)
+    (define-key map "R" 'notmuch-show-reply)
+    (define-key map "|" 'notmuch-show-pipe-message)
+    (define-key map "w" 'notmuch-show-save-attachments)
+    (define-key map "V" 'notmuch-show-view-raw-message)
+    (define-key map "c" 'notmuch-show-stash-map)
+    (define-key map "h" 'notmuch-show-toggle-visibility-headers)
+    (define-key map "*" 'notmuch-show-tag-all)
+    (define-key map "-" 'notmuch-show-remove-tag)
+    (define-key map "+" 'notmuch-show-add-tag)
+    (define-key map "X" 'notmuch-show-archive-thread-then-exit)
+    (define-key map "x" 'notmuch-show-archive-message-then-next-or-exit)
+    (define-key map "A" 'notmuch-show-archive-thread-then-next)
+    (define-key map "a" 'notmuch-show-archive-message-then-next-or-next-thread)
+    (define-key map "N" 'notmuch-show-next-message)
+    (define-key map "P" 'notmuch-show-previous-message)
+    (define-key map "n" 'notmuch-show-next-open-message)
+    (define-key map "p" 'notmuch-show-previous-open-message)
+    (define-key map (kbd "M-n") 'notmuch-show-next-thread-show)
+    (define-key map (kbd "M-p") 'notmuch-show-previous-thread-show)
+    (define-key map (kbd "DEL") 'notmuch-show-rewind)
+    (define-key map " " 'notmuch-show-advance-and-archive)
+    (define-key map (kbd "M-RET") 'notmuch-show-open-or-close-all)
+    (define-key map (kbd "RET") 'notmuch-show-toggle-message)
+    (define-key map "#" 'notmuch-show-print-message)
+    (define-key map "!" 'notmuch-show-toggle-elide-non-matching)
+    (define-key map "$" 'notmuch-show-toggle-process-crypto)
+    (define-key map "<" 'notmuch-show-toggle-thread-indentation)
+    (define-key map "t" 'toggle-truncate-lines)
+    (define-key map "." 'notmuch-show-part-map)
+    map)
+  "Keymap for \"notmuch show\" buffers.")
 (fset 'notmuch-show-mode-map notmuch-show-mode-map)
 
 (defun notmuch-show-mode ()