Merge from origin/emacs-26

a1c53d4 (origin/emacs-26) * admin/admin.el (make-manuals-dist--1): Up...
d0f745f Document some compilation-mode faces
23ccba0 Mention the assignment form in "Copyright Assignment"
0f5568e Fix confusing wording in the user manual
70ec392 Fix the MSDOS build when running under CWSDPMI
7a608fc * lisp/progmodes/python.el: Be more careful about temp file r...

admin/admin.el

@@ -696,6 +696,7 @@ style=\"text-align:left\">")
     (if (file-directory-p stem)
 	(delete-directory stem t))
     (make-directory stem)
+    (setq stem (file-name-as-directory stem))
     (copy-file "../doc/misc/texinfo.tex" stem)
     (unless (equal type "emacs")
       (copy-file "../doc/emacs/emacsver.texi" stem)
@@ -718,7 +719,7 @@ style=\"text-align:left\">")
 	  (setq ats t)
 	  (message "Unexpanded: %s" (match-string 0)))
 	(if ats (error "Unexpanded configure variables in Makefile?")))
-      (write-region nil nil (expand-file-name (format "%s/Makefile" stem))
+      (write-region nil nil (expand-file-name (format "%sMakefile" stem))
 		    nil 'silent))
     (call-process "tar" nil nil nil "-cf" tarfile stem)
     (delete-directory stem t)

doc/emacs/building.texi

@@ -151,6 +151,20 @@ with the mouse (@pxref{Mouse References}), to visit the @dfn{locus} of
 the error message in a separate window.  The locus is the specific
 position in a file where that error occurred.
 
+@cindex compilation mode faces
+@vindex compilation-error
+@vindex compilation-warning
+  The appearance of the @file{*compilation*} buffer can be controlled
+by customizing the faces which are used to highlight parts of the
+@file{*compilation*} buffer, e.g., @code{compilation-error} or
+@code{compilation-warning}, for error and warning messages
+respectively.  Note that since those faces inherit from the
+@code{error} and @code{warning} faces, it is also possible to
+customize the parent face directly instead.
+
+  Use @w{@kbd{M-x customize-group RET compilation}} to see the entire
+list of customization variables and faces.
+
 @findex compile-goto-error
 @vindex compilation-auto-jump-to-first-error
   If you change the variable

doc/emacs/maintaining.texi

@@ -1093,8 +1093,7 @@ started editing, and asks for confirmation for discarding the changes.
 If you agree, the fileset is reverted.  If you don't want @kbd{C-x v
 u} to show a diff, set the variable @code{vc-revert-show-diff} to
 @code{nil} (you can still view the diff directly with @kbd{C-x v =};
-@pxref{Old Revisions}).  Note that @kbd{C-x v u} cannot be reversed
-with the usual undo commands (@pxref{Undo}), so use it with care.
+@pxref{Old Revisions}).
 
   On locking-based version control systems, @kbd{C-x v u} leaves files
 unlocked; you must lock again to resume editing.  You can also use

doc/emacs/trouble.texi

@@ -1400,9 +1400,10 @@ to the FSF@.  For the reasons behind this, see
 @url{https://www.gnu.org/licenses/why-assign.html}.
 
 Copyright assignment is a simple process.  Residents of some countries
-can do it entirely electronically.  We can help you get started, and
-answer any questions you may have (or point you to the people with the
-answers), at the @email{emacs-devel@@gnu.org} mailing list.
+can do it entirely electronically.  We can help you get started,
+including sending you the forms you should fill, and answer any
+questions you may have (or point you to the people with the answers),
+at the @email{emacs-devel@@gnu.org} mailing list.
 
 (Please note: general discussion about why some GNU projects ask
 for a copyright assignment is off-topic for emacs-devel.

lisp/progmodes/python.el

@@ -2303,15 +2303,16 @@ detection and just returns nil."
                          ;; carriage returns in unbuffered mode.
                          (let ((inhibit-eol-conversion (getenv "PYTHONUNBUFFERED")))
                            (python-shell--save-temp-file code))))
-                    ;; Use `process-file' as it is remote-host friendly.
-                    (process-file
-                     interpreter
-                     code-file
-                     '(t nil)
-                     nil
-                     interpreter-arg)
-                    ;; Try to cleanup
-                    (delete-file code-file)))
+                    (unwind-protect
+                        ;; Use `process-file' as it is remote-host friendly.
+                        (process-file
+                         interpreter
+                         code-file
+                         '(t nil)
+                         nil
+                         interpreter-arg)
+                      ;; Try to cleanup
+                      (delete-file code-file))))
                 (buffer-string)))
              (prompts
               (catch 'prompts

src/dispnew.c

@@ -6142,6 +6142,7 @@ init_display_interactive (void)
 
     t->reference_count++;
 #ifdef MSDOS
+    f->output_data.tty = &the_only_tty_output;
     f->output_data.tty->display_info = &the_only_display_info;
 #else
     if (f->output_method == output_termcap)

src/frame.c

@@ -1118,6 +1118,7 @@ make_terminal_frame (struct terminal *terminal)
   f->terminal = terminal;
   f->terminal->reference_count++;
 #ifdef MSDOS
+  f->output_data.tty = &the_only_tty_output;
   f->output_data.tty->display_info = &the_only_display_info;
   if (!inhibit_window_system
       && (!FRAMEP (selected_frame) || !FRAME_LIVE_P (XFRAME (selected_frame))

src/msdos.c

@@ -420,6 +420,9 @@ static unsigned short outside_cursor;
 /* The only display since MS-DOS does not support multiple ones.  */
 struct tty_display_info the_only_display_info;
 
+/* The only tty_output, since MS-DOS supports only 1 display.  */
+struct tty_output the_only_tty_output;
+
 /* Support for DOS/V (allows Japanese characters to be displayed on
    standard, non-Japanese, ATs).  Only supported for DJGPP v2 and later.  */
 

src/msdos.h

@@ -93,6 +93,7 @@ typedef int XRectangle;
 typedef struct tty_display_info Display_Info;
 
 extern struct tty_display_info the_only_display_info;
+extern struct tty_output the_only_tty_output;
 
 #define FRAME_X_DISPLAY(f) ((Display *) 0)
 #define FRAME_FONT(f) ((f)->output_data.tty->font)