emacs: Always insert crypto buttons.

When no decryption or signature examination is
happening (i.e. `notmuch-crypto-process-mime' is `nil') insert buttons
that indicate this, rather than remaining silent.

emacs/notmuch-show.el

@@ -642,15 +642,10 @@ will return nil if the CID is unknown or cannot be retrieved."
 (defun notmuch-show-insert-part-multipart/signed (msg part content-type nth depth button)
   (when button
     (button-put button 'face 'notmuch-crypto-part-header))
-  ;; Add signature status button if sigstatus provided.
-  (if (plist-member part :sigstatus)
-      (let* ((from (notmuch-show-get-header :From msg))
-	     (sigstatus (car (plist-get part :sigstatus))))
-	(notmuch-crypto-insert-sigstatus-button sigstatus from))
-    ;; If we're not adding the signature status, tell the user how
-    ;; they can get it.
-    (when button
-      (button-put button 'help-echo "Set notmuch-crypto-process-mime to process cryptographic MIME parts.")))
+
+  ;; Insert a button detailing the signature status.
+  (notmuch-crypto-insert-sigstatus-button (car (plist-get part :sigstatus))
+					  (notmuch-show-get-header :From msg))
 
   (let ((inner-parts (plist-get part :content))
 	(start (point)))
@@ -666,20 +661,13 @@ will return nil if the CID is unknown or cannot be retrieved."
 (defun notmuch-show-insert-part-multipart/encrypted (msg part content-type nth depth button)
   (when button
     (button-put button 'face 'notmuch-crypto-part-header))
-  ;; Add encryption status button if encryption status is specified.
-  (if (plist-member part :encstatus)
-      (let ((encstatus (car (plist-get part :encstatus))))
-	(notmuch-crypto-insert-encstatus-button encstatus)
-	;; Add signature status button if signature status is
-	;; specified.
-	(if (plist-member part :sigstatus)
-	    (let* ((from (notmuch-show-get-header :From msg))
-		   (sigstatus (car (plist-get part :sigstatus))))
-	      (notmuch-crypto-insert-sigstatus-button sigstatus from))))
-    ;; If we're not adding the encryption status, tell the user how
-    ;; they can get it.
-    (when button
-      (button-put button 'help-echo "Set notmuch-crypto-process-mime to process cryptographic MIME parts.")))
+
+  ;; Insert a button detailing the encryption status.
+  (notmuch-crypto-insert-encstatus-button (car (plist-get part :encstatus)))
+
+  ;; Insert a button detailing the signature status.
+  (notmuch-crypto-insert-sigstatus-button (car (plist-get part :sigstatus))
+					  (notmuch-show-get-header :From msg))
 
   (let ((inner-parts (plist-get part :content))
 	(start (point)))

test/T310-emacs.sh

@@ -394,6 +394,8 @@ User-Agent: Notmuch/XXX Emacs/XXX
 --text follows this line--
 Adrian Perez de Castro <aperez@igalia.com> writes:
 
+> [ Unknown signature status ]
+>
 > Hello to all,
 >
 > I have just heard about Not Much today in some random Linux-related news

test/emacs-show.expected-output/notmuch-show-elide-non-matching-messages-off

@@ -5,6 +5,7 @@ Date: Tue, 17 Nov 2009 14:00:54 -0500
 
 [ multipart/mixed ]
 [ multipart/signed ]
+[ Unknown signature status ]
 [ text/plain ]
 I saw the LWN article and decided to take a look at notmuch.  I'm
 currently using mutt and mairix to index and read a collection of
@@ -39,6 +40,7 @@ Cheers,
 
   [ multipart/mixed ]
   [ multipart/signed ]
+  [ Unknown signature status ]
   [ text/plain ]
   > See the patch just posted here.
 
@@ -65,6 +67,7 @@ Cheers,
 
     [ multipart/mixed ]
     [ multipart/signed ]
+    [ Unknown signature status ]
     [ text/plain ]
     > I've also pushed a slightly more complicated (and complete) fix to my
     > private notmuch repository

test/emacs-show.expected-output/notmuch-show-elide-non-matching-messages-on

@@ -5,6 +5,7 @@ Date: Tue, 17 Nov 2009 14:00:54 -0500
 
 [ multipart/mixed ]
 [ multipart/signed ]
+[ Unknown signature status ]
 [ text/plain ]
 I saw the LWN article and decided to take a look at notmuch.  I'm
 currently using mutt and mairix to index and read a collection of
@@ -38,6 +39,7 @@ Cheers,
 
   [ multipart/mixed ]
   [ multipart/signed ]
+  [ Unknown signature status ]
   [ text/plain ]
   > See the patch just posted here.
 
@@ -62,6 +64,7 @@ Cheers,
 
     [ multipart/mixed ]
     [ multipart/signed ]
+    [ Unknown signature status ]
     [ text/plain ]
     > I've also pushed a slightly more complicated (and complete) fix to my
     > private notmuch repository

test/emacs-show.expected-output/notmuch-show-indent-thread-content-off

@@ -5,6 +5,7 @@ Date: Tue, 17 Nov 2009 14:00:54 -0500
 
 [ multipart/mixed ]
 [ multipart/signed ]
+[ Unknown signature status ]
 [ text/plain ]
 I saw the LWN article and decided to take a look at notmuch.  I'm
 currently using mutt and mairix to index and read a collection of
@@ -39,6 +40,7 @@ Date: Tue, 17 Nov 2009 15:33:01 -0500
 
 [ multipart/mixed ]
 [ multipart/signed ]
+[ Unknown signature status ]
 [ text/plain ]
 > See the patch just posted here.
 
@@ -65,6 +67,7 @@ Date: Tue, 17 Nov 2009 19:50:40 -0500
 
 [ multipart/mixed ]
 [ multipart/signed ]
+[ Unknown signature status ]
 [ text/plain ]
 > I've also pushed a slightly more complicated (and complete) fix to my
 > private notmuch repository

test/emacs-show.expected-output/notmuch-show-process-crypto-mime-parts-off

@@ -9,6 +9,7 @@ Subject: [notmuch] Working with Maildir storage?
 
   [ multipart/mixed ]
   [ multipart/signed ]
+  [ Unknown signature status ]
   [ text/plain ]
   > See the patch just posted here.
 

test/emacs.expected-output/notmuch-show-thread-maildir-storage

@@ -5,6 +5,7 @@ Date: Tue, 17 Nov 2009 14:00:54 -0500
 
 [ multipart/mixed ]
 [ multipart/signed ]
+[ Unknown signature status ]
 [ text/plain ]
 I saw the LWN article and decided to take a look at notmuch.  I'm
 currently using mutt and mairix to index and read a collection of
@@ -45,6 +46,7 @@ http://notmuchmail.org/mailman/listinfo/notmuch
 
  [ multipart/mixed ]
  [ multipart/signed ]
+ [ Unknown signature status ]
  [ text/plain ]
 
  Twas brillig at 14:00:54 17.11.2009 UTC-05 when lars@seas.harvard.edu did
@@ -77,6 +79,7 @@ http://notmuchmail.org/mailman/listinfo/notmuch
 
   [ multipart/mixed ]
   [ multipart/signed ]
+  [ Unknown signature status ]
   [ text/plain ]
   > See the patch just posted here.
 
@@ -159,6 +162,7 @@ http://notmuchmail.org/mailman/listinfo/notmuch
 
     [ multipart/mixed ]
     [ multipart/signed ]
+    [ Unknown signature status ]
     [ text/plain ]
     > I've also pushed a slightly more complicated (and complete) fix to my
     > private notmuch repository

test/emacs.expected-output/notmuch-show-thread-maildir-storage-with-fourfold-indentation

@@ -5,6 +5,7 @@ Date: Tue, 17 Nov 2009 14:00:54 -0500
 
 [ multipart/mixed ]
 [ multipart/signed ]
+[ Unknown signature status ]
 [ text/plain ]
 I saw the LWN article and decided to take a look at notmuch.  I'm
 currently using mutt and mairix to index and read a collection of
@@ -45,6 +46,7 @@ http://notmuchmail.org/mailman/listinfo/notmuch
 
     [ multipart/mixed ]
     [ multipart/signed ]
+    [ Unknown signature status ]
     [ text/plain ]
 
     Twas brillig at 14:00:54 17.11.2009 UTC-05 when lars@seas.harvard.edu did
@@ -77,6 +79,7 @@ http://notmuchmail.org/mailman/listinfo/notmuch
 
 	[ multipart/mixed ]
 	[ multipart/signed ]
+	[ Unknown signature status ]
 	[ text/plain ]
 	> See the patch just posted here.
 
@@ -159,6 +162,7 @@ http://notmuchmail.org/mailman/listinfo/notmuch
 
 		[ multipart/mixed ]
 		[ multipart/signed ]
+		[ Unknown signature status ]
 		[ text/plain ]
 		> I've also pushed a slightly more complicated (and complete) fix to my
 		> private notmuch repository

test/emacs.expected-output/notmuch-show-thread-maildir-storage-without-indentation

@@ -5,6 +5,7 @@ Date: Tue, 17 Nov 2009 14:00:54 -0500
 
 [ multipart/mixed ]
 [ multipart/signed ]
+[ Unknown signature status ]
 [ text/plain ]
 I saw the LWN article and decided to take a look at notmuch.  I'm
 currently using mutt and mairix to index and read a collection of
@@ -45,6 +46,7 @@ Date: Wed, 18 Nov 2009 01:02:38 +0600
 
 [ multipart/mixed ]
 [ multipart/signed ]
+[ Unknown signature status ]
 [ text/plain ]
 
 Twas brillig at 14:00:54 17.11.2009 UTC-05 when lars@seas.harvard.edu did
@@ -77,6 +79,7 @@ Date: Tue, 17 Nov 2009 15:33:01 -0500
 
 [ multipart/mixed ]
 [ multipart/signed ]
+[ Unknown signature status ]
 [ text/plain ]
 > See the patch just posted here.
 
@@ -159,6 +162,7 @@ Date: Tue, 17 Nov 2009 19:50:40 -0500
 
 [ multipart/mixed ]
 [ multipart/signed ]
+[ Unknown signature status ]
 [ text/plain ]
 > I've also pushed a slightly more complicated (and complete) fix to my
 > private notmuch repository

test/tree.expected-output/notmuch-tree-show-window

@@ -5,6 +5,7 @@ Date: Tue, 17 Nov 2009 14:00:54 -0500
 
 [ multipart/mixed ]
 [ multipart/signed ]
+[ Unknown signature status ]
 [ text/plain ]
 I saw the LWN article and decided to take a look at notmuch.  I'm
 currently using mutt and mairix to index and read a collection of