Merge from origin/emacs-26

fa953b5 (origin/emacs-26) Fix an epg test for recent GnuPG versions (...
3015636 Document font structure layout constraints
f14d574 Document font structure layout constraints
f519aa1 Fix display of line numbers in empty lines beyond EOB
24b5026 Fix redisplay when a window's scroll bar or fringes are changed
5d1b158 Tiny markup fix in Elisp manual

doc/lispref/lists.texi

@@ -656,7 +656,7 @@ resulting list.  Instead, the sequence becomes the final @sc{cdr}, like
 any other non-list final argument.
 
 @defun copy-tree tree &optional vecp
-This function returns a copy of the tree @code{tree}.  If @var{tree} is a
+This function returns a copy of the tree @var{tree}.  If @var{tree} is a
 cons cell, this makes a new cons cell with the same @sc{car} and
 @sc{cdr}, then recursively copies the @sc{car} and @sc{cdr} in the
 same way.

src/ftcrfont.c

@@ -35,8 +35,9 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 struct ftcrfont_info
 {
   struct font font;
-  /* The following six members must be here in this order to be
+  /* The following members up to and including 'matrix' must be here
-     compatible with struct ftfont_info (in ftfont.c).  */
+     in this order to be compatible with struct ftfont_info (in
+     ftfont.c).  */
 #ifdef HAVE_LIBOTF
   bool maybe_otf;	  /* Flag to tell if this may be OTF or not.  */
   OTF *otf;

src/ftfont.c

@@ -56,8 +56,9 @@ struct ftfont_info
 {
   struct font font;
 #ifdef HAVE_LIBOTF
-  /* The following four members must be here in this order to be
+  /* The following members up to and including 'matrix' must be here in
-     compatible with struct xftfont_info (in xftfont.c).  */
+     this order to be compatible with struct xftfont_info (in
+     xftfont.c).  */
   bool maybe_otf;	/* Flag to tell if this may be OTF or not.  */
   OTF *otf;
 #endif	/* HAVE_LIBOTF */

src/window.c

@@ -7176,6 +7176,11 @@ set_window_fringes (struct window *w, Lisp_Object left_width,
       w->right_fringe_width = right;
       w->fringes_outside_margins = outside;
 
+      /* This is needed to trigger immediate redisplay of the window
+	 when its fringes are changed, because fringes are redrawn
+	 only if update_window is called, so we must trigger that even
+	 if the window's glyph matrices did not change at all.  */
+      windows_or_buffers_changed = 35;
       return w;
     }
   else
@@ -7293,6 +7298,12 @@ set_window_scroll_bars (struct window *w, Lisp_Object width,
   wset_horizontal_scroll_bar_type (w, Qnil);
 #endif
 
+  /* This is needed to trigger immediate redisplay of the window when
+     scroll bars are changed, because scroll bars are redisplayed only
+     if more than a single window needs to be considered, see
+     redisplay_internal.  */
+  if (changed)
+    windows_or_buffers_changed = 31;
   return changed ? w : NULL;
 }
 

src/xdisp.c

@@ -21242,7 +21242,10 @@ maybe_produce_line_number (struct it *it)
       if (lnum_face_id != current_lnum_face_id
 	  && (EQ (Vdisplay_line_numbers, Qvisual)
 	      ? this_line == 0
-	      : this_line == it->pt_lnum))
+	      : this_line == it->pt_lnum)
+	  /* Avoid displaying the line-number-current-line face on
+	     empty lines beyond EOB.  */
+	  && it->what != IT_EOB)
 	tem_it.face_id = current_lnum_face_id;
       else
 	tem_it.face_id = lnum_face_id;

src/xftfont.c

@@ -42,8 +42,9 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 struct xftfont_info
 {
   struct font font;
-  /* The following five members must be here in this order to be
+  /* The following members up to and including 'matrix' must be here
-     compatible with struct ftfont_info (in ftfont.c).  */
+     in this order to be compatible with struct ftfont_info (in
+     ftfont.c).  */
 #ifdef HAVE_LIBOTF
   bool maybe_otf;	  /* Flag to tell if this may be OTF or not.  */
   OTF *otf;
@@ -51,6 +52,7 @@ struct xftfont_info
   FT_Size ft_size;
   int index;
   FT_Matrix matrix;
+
   Display *display;
   XftFont *xftfont;
   unsigned x_display_id;

test/lisp/epg-tests.el

@@ -108,6 +108,8 @@
 
 (ert-deftest epg-decrypt-1 ()
   (with-epg-tests (:require-passphrase t)
+    (with-temp-file (expand-file-name "gpg.conf" epg-tests-home-directory)
+      (insert "ignore-mdc-error"))
     (should (equal "test"
 		   (epg-decrypt-string epg-tests-context "\
 -----BEGIN PGP MESSAGE-----