Follow user preference in calendar diagnostics

Respect text-quoting-style preference in diagnostic formats by
using curved quotes (which are translated as per text-quoting-style)
instead of grave accent and apostrophe (which are not).
* lisp/calendar/appt.el (appt-display-message):
* lisp/calendar/diary-lib.el (diary-check-diary-file)
(diary-mail-entries, diary-from-outlook):
* lisp/calendar/icalendar.el (icalendar-export-region)
(icalendar--convert-float-to-ical)
(icalendar--convert-date-to-ical)
(icalendar--convert-ical-to-diary)
(icalendar--convert-recurring-to-diary)
(icalendar--add-diary-entry):
* lisp/calendar/time-date.el (format-seconds):
* lisp/calendar/timeclock.el (timeclock-mode-line-display)
(timeclock-make-hours-explicit):
* lisp/calendar/todo-mode.el (todo-prefix, todo-delete-category)
(todo-item-mark, todo-check-format)
(todo-insert-item--next-param, todo-edit-item--next-key)
(todo-mode):
Use curved quotes in diagnostic format strings.
* lisp/calendar/icalendar.el (icalendar-import-format-sample):
* test/automated/icalendar-tests.el (icalendar--import-format-sample):
Just use straight quoting for simple test case.

7 files changed, 28 insertions, 28 deletions

diff --git a/lisp/calendar/appt.el b/lisp/calendar/appt.el
index d5d8a400218..426bb286ebb 100644
--- a/lisp/calendar/appt.el
+++ b/lisp/calendar/appt.el
@@ -239,7 +239,7 @@ also calls `beep' for an audible reminder."
              (wrong-type-argument
               (if (not (listp mins))
                   (signal (car err) (cdr err))
-                (message "Argtype error in `appt-disp-window-function' - \
+                (message "Argtype error in ‘appt-disp-window-function’ - \
 update it for multiple appts?")
                 ;; Fallback to just displaying the first appt, as we used to.
                 (funcall appt-disp-window-function
diff --git a/lisp/calendar/diary-lib.el b/lisp/calendar/diary-lib.el
index 1cb13e412b6..dd068196adc 100644
--- a/lisp/calendar/diary-lib.el
+++ b/lisp/calendar/diary-lib.el
@@ -484,8 +484,8 @@ If so, return the expanded file name, otherwise signal an error."
   (if (and diary-file (file-exists-p diary-file))
       (if (file-readable-p diary-file)
           diary-file
-        (error "Diary file `%s' is not readable" diary-file))
-    (error "Diary file `%s' does not exist" diary-file)))
+        (error "Diary file ‘%s’ is not readable" diary-file))
+    (error "Diary file ‘%s’ does not exist" diary-file)))
 
 ;;;###autoload
 (defun diary (&optional arg)
@@ -1197,7 +1197,7 @@ ensure that all relevant variables are set.
 "
   (interactive "P")
   (if (string-equal diary-mail-addr "")
-      (user-error "You must set `diary-mail-addr' to use this command")
+      (user-error "You must set ‘diary-mail-addr’ to use this command")
     (let ((diary-display-function 'diary-fancy-display))
       (diary-list-entries (calendar-current-date) (or ndays diary-mail-days)))
     (compose-mail diary-mail-addr
@@ -2527,7 +2527,7 @@ entry is found the user is asked to confirm its addition."
                 #'diary-from-outlook-rmail)
                ((memq major-mode '(gnus-summary-mode gnus-article-mode))
                 #'diary-from-outlook-gnus)
-               (t (error "Don't know how to snarf in `%s'" major-mode)))))
+               (t (error "Don't know how to snarf in ‘%s’" major-mode)))))
     (funcall func noconfirm)))
 
 (provide 'diary-lib)
diff --git a/lisp/calendar/icalendar.el b/lisp/calendar/icalendar.el
index 734462dd322..bced4e20e02 100644
--- a/lisp/calendar/icalendar.el
+++ b/lisp/calendar/icalendar.el
@@ -1118,7 +1118,7 @@ FExport diary data into iCalendar file: ")
            (setq found-error t)
            (save-current-buffer
              (set-buffer (get-buffer-create "*icalendar-errors*"))
-             (insert (format "Error in line %d -- %s: `%s'\n"
+             (insert (format "Error in line %d -- %s: ‘%s’\n"
                              (count-lines (point-min) (point))
                              error-val
                              entry-main))))))
@@ -1741,7 +1741,7 @@ entries.  ENTRY-MAIN is the first line of the diary entry."
           (when day
             (progn
               (icalendar--dmsg "diary-float %s" entry-main)
-              (error "Don't know if or how to implement day in `diary-float'")))
+              (error "Don't know if or how to implement day in ‘diary-float’")))
 
           (cons (concat
                  ;;Start today (yes this is an arbitrary choice):
@@ -1788,7 +1788,7 @@ entries.  ENTRY-MAIN is the first line of the diary entry."
                     entry-main)
       (progn
         (icalendar--dmsg "diary-date %s" entry-main)
-        (error "`diary-date' is not supported yet"))
+        (error "‘diary-date’ is not supported yet"))
     ;; no match
     nil))
 
@@ -2104,7 +2104,7 @@ written into the buffer `*icalendar-errors*'."
                  (rrule (icalendar--get-event-property e 'RRULE))
                  (rdate (icalendar--get-event-property e 'RDATE))
                  (duration (icalendar--get-event-property e 'DURATION)))
-            (icalendar--dmsg "%s: `%s'" start-d summary)
+            (icalendar--dmsg "%s: ‘%s’" start-d summary)
             ;; check whether start-time is missing
             (if  (and dtstart
                       (string=
@@ -2282,7 +2282,7 @@ END-T is the event's end time in diary format."
                                                    interval))))
                  )
                 (t
-                 (message "Cannot handle COUNT attribute for `%s' events."
+                 (message "Cannot handle COUNT attribute for ‘%s’ events."
                           frequency)))
           (setq until-conv (icalendar--datetime-to-diary-date until))
           (setq until-1-conv (icalendar--datetime-to-diary-date until-1))
@@ -2473,7 +2473,7 @@ SUMMARY is not nil it must be a string that gives the summary of the
 entry.  In this case the user will be asked whether he wants to insert
 the entry."
   (when (or (not summary)
-            (y-or-n-p (format "Add appointment for `%s' to diary? "
+            (y-or-n-p (format "Add appointment for ‘%s’ to diary? "
                               summary)))
     (when summary
       (setq non-marking
@@ -2500,8 +2500,8 @@ the entry."
 ;; ======================================================================
 (defun icalendar-import-format-sample (event)
   "Example function for formatting an iCalendar EVENT."
-  (format (concat "SUMMARY=`%s' DESCRIPTION=`%s' LOCATION=`%s' ORGANIZER=`%s' "
-                  "STATUS=`%s' URL=`%s' CLASS=`%s'")
+  (format (concat "SUMMARY='%s' DESCRIPTION='%s' LOCATION='%s' ORGANIZER='%s' "
+                  "STATUS='%s' URL='%s' CLASS='%s'")
           (or (icalendar--get-event-property event 'SUMMARY) "")
           (or (icalendar--get-event-property event 'DESCRIPTION) "")
           (or (icalendar--get-event-property event 'LOCATION) "")
diff --git a/lisp/calendar/time-date.el b/lisp/calendar/time-date.el
index bb7e97ea7f3..c13ef97c6b9 100644
--- a/lisp/calendar/time-date.el
+++ b/lisp/calendar/time-date.el
@@ -377,9 +377,9 @@ This function does not work for SECONDS greater than `most-positive-fixnum'."
             spec (match-string 1 string))
       (unless (string-equal spec "%")
         (or (setq match (assoc (downcase spec) units))
-            (error "Bad format specifier: `%s'" spec))
+            (error "Bad format specifier: ‘%s’" spec))
         (if (assoc (downcase spec) usedunits)
-            (error "Multiple instances of specifier: `%s'" spec))
+            (error "Multiple instances of specifier: ‘%s’" spec))
         (if (string-equal (car match) "z")
             (setq zeroflag t)
           (unless larger
diff --git a/lisp/calendar/timeclock.el b/lisp/calendar/timeclock.el
index cd79781fbd6..e9a11668f23 100644
--- a/lisp/calendar/timeclock.el
+++ b/lisp/calendar/timeclock.el
@@ -305,8 +305,8 @@ display (non-nil means on)."
               ;; on calling this function.
               (if display-time-mode
                   (timeclock-update-mode-line)
-                (message "Activate `display-time-mode' or turn off \
-`timeclock-use-display-time' to see timeclock information"))
+                (message "Activate ‘display-time-mode’ or turn off \
+‘timeclock-use-display-time’ to see timeclock information"))
               (add-hook 'display-time-hook 'timeclock-update-mode-line))
           (setq timeclock-update-timer
                 (run-at-time nil 60 'timeclock-update-mode-line))))
@@ -575,7 +575,7 @@ relative only to the time worked today, and not to past time."
 OLD-DEFAULT hours are set for every day that has no number indicated."
   (interactive "P")
   (if old-default (setq old-default (prefix-numeric-value old-default))
-    (error "`timelog-make-hours-explicit' requires an explicit argument"))
+    (error "‘timelog-make-hours-explicit’ requires an explicit argument"))
   (let ((extant-timelog (find-buffer-visiting timeclock-file))
 	current-date)
     (with-current-buffer (find-file-noselect timeclock-file t)
@@ -589,7 +589,7 @@ OLD-DEFAULT hours are set for every day that has no number indicated."
 		(unless (looking-at
 			 (concat "^\\([bhioO]\\) \\([0-9]+/[0-9]+/[0-9]+\\) "
 				 "\\([0-9]+:[0-9]+:[0-9]+\\)"))
-		  (error "Can't parse `%s'" timeclock-file))
+		  (error "Can't parse ‘%s’" timeclock-file))
 		(let ((this-date (match-string 2)))
 		  (unless (or (and current-date
 				   (string= this-date current-date))
diff --git a/lisp/calendar/todo-mode.el b/lisp/calendar/todo-mode.el
index 962f425ecf5..e780e4ee11e 100644
--- a/lisp/calendar/todo-mode.el
+++ b/lisp/calendar/todo-mode.el
@@ -237,7 +237,7 @@ The final element is \"*\", indicating an unspecified month.")
 		   (when (string= (widget-value widget) todo-item-mark)
 		     (widget-put
 		      widget :error
-		      "Invalid value: must be distinct from `todo-item-mark'")
+		      "Invalid value: must be distinct from ‘todo-item-mark’")
 		     widget)))
   :initialize 'custom-initialize-default
   :set 'todo-reset-prefix
@@ -1346,7 +1346,7 @@ todo or done items."
 				     "the archived category will remain\n"
 				     "after deleting the todo category.  "
 				     "Do you still want to delete it\n"
-				     "(see `todo-skip-archived-categories' "
+				     "(see ‘todo-skip-archived-categories’ "
 				     "for another option)? ")))
 		  (t
 		   (todo-y-or-n-p (concat "Permanently remove category \"" cat
@@ -1694,7 +1694,7 @@ only when no items are marked."
 		   (when (string= (widget-value widget) todo-prefix)
 		     (widget-put
 		      widget :error
-		      "Invalid value: must be distinct from `todo-prefix'")
+		      "Invalid value: must be distinct from ‘todo-prefix’")
 		     widget)))
   :set (lambda (symbol value)
 	 (custom-set-default symbol (propertize value 'face 'todo-mark)))
@@ -5034,7 +5034,7 @@ but the categories sexp differs from the current value of
 	;; Warn user if categories sexp has changed.
 	(unless (string= ssexp cats)
 	  (message (concat "The sexp at the beginning of the file differs "
-			   "from the value of `todo-categories.\n"
+			   "from the value of ‘todo-categories’.\n"
 			   "If the sexp is wrong, you can fix it with "
 			   "M-x todo-repair-categories-sexp,\n"
 			   "but note this reverts any changes you have "
@@ -5531,7 +5531,7 @@ already entered and those still available."
 			 (todo-insert-item--this-key)
 			 todo-insert-item--argsleft)))))))))
       (setq todo-insert-item--argsleft todo-insert-item--newargsleft))
-    (when prompt (message "Press a key (so far `%s'): %s"
+    (when prompt (message "Press a key (so far ‘%s’): %s"
 			  todo-insert-item--keys-so-far prompt))
     (set-transient-map map)
     (setq todo-insert-item--argsleft argsleft)))
@@ -5585,7 +5585,7 @@ already entered and those still available."
       (`delete (todo-edit-item--text 'comment-delete))
       (`diary (todo-edit-item--diary-inclusion))
       (`nonmarking (todo-edit-item--diary-inclusion 'nonmarking))
-      (`date (let ((todo-edit-item--prompt "Press a key (so far `e d'): "))
+      (`date (let ((todo-edit-item--prompt "Press a key (so far ‘e d’): "))
 	       (todo-edit-item--next-key
 		todo-edit-item--date-param-key-alist arg)))
       (`full (progn (todo-edit-item--header 'date)
@@ -6598,7 +6598,7 @@ Added to `window-configuration-change-hook' in Todo mode."
 
 \\{todo-mode-map}"
   (if (called-interactively-p 'any)
-      (message "Type `M-x todo-show' to enter Todo mode")
+      (message "Type ‘M-x todo-show’ to enter Todo mode")
     (todo-modes-set-1)
     (todo-modes-set-2)
     (todo-modes-set-3)
diff --git a/test/automated/icalendar-tests.el b/test/automated/icalendar-tests.el
index 3614c7adc76..c83044c719e 100644
--- a/test/automated/icalendar-tests.el
+++ b/test/automated/icalendar-tests.el
@@ -391,8 +391,8 @@ END:VTIMEZONE
 
 (ert-deftest icalendar--import-format-sample ()
   "Test method for `icalendar-import-format-sample'."
-  (should (string= (concat "SUMMARY=`a' DESCRIPTION=`b' LOCATION=`c' "
-                           "ORGANIZER=`d' STATUS=`' URL=`' CLASS=`'")
+  (should (string= (concat "SUMMARY='a' DESCRIPTION='b' LOCATION='c' "
+                           "ORGANIZER='d' STATUS='' URL='' CLASS=''")
 		   (icalendar-import-format-sample
                     (icalendar-tests--get-ical-event "BEGIN:VEVENT
 DTSTAMP:20030509T043439Z