Use format-prompt for many more prompts

* lisp/bookmark.el (bookmark-completing-read):
* lisp/calc/calc-prog.el (calc-user-define-formula):
* lisp/calc/calc-store.el (calc-permanent-variable):
* lisp/calc/calc-units.el (calc-convert-units)
(calc-convert-exact-units, calc-convert-temperature):
* lisp/cedet/semantic/complete.el
(semantic-complete-read-tag-engine):
* lisp/cus-edit.el (customize-read-group):
* lisp/dired-aux.el (dired-do-chxxx):
* lisp/dired-x.el (dired-mark-unmarked-files):
* lisp/emacs-lisp/debug.el (cancel-debug-on-entry)
(cancel-debug-on-variable-change):
* lisp/emacs-lisp/edebug.el (edebug-cancel-on-entry)
(edebug-remove-instrumentation):
* lisp/epa.el (epa-read-file-name, epa-export-keys):
* lisp/faces.el (read-face-name):
* lisp/format.el (format-decode-buffer, format-decode-region):
* lisp/gnus/gnus-art.el (gnus-read-save-file-name):
* lisp/gnus/gnus-util.el (gnus-completing-read):
* lisp/gnus/message.el (message-check-news-header-syntax):
* lisp/info.el (Info-follow-reference):
* lisp/international/mule-diag.el (describe-font)
(describe-fontset):
* lisp/international/quail.el (quail-show-keyboard-layout):
* lisp/language/cyril-util.el
(standard-display-cyrillic-translit):
* lisp/mail/rmailkwd.el (rmail-read-label):
* lisp/mail/rmailmm.el (rmail-mime-save):
* lisp/mail/rmailout.el (rmail-output-read-file-name):
* lisp/man.el (Man-goto-section, Man-follow-manual-reference):
* lisp/menu-bar.el (emacs-index--prompt):
* lisp/net/ange-ftp.el (ange-ftp-get-passwd):
* lisp/proced.el (proced-send-signal):
* lisp/progmodes/cpp.el (cpp-choose-face):
* lisp/progmodes/ebrowse.el (ebrowse-set-tree-indentation):
* lisp/progmodes/etags.el (visit-tags-table)
(visit-tags-table-buffer):
* lisp/progmodes/grep.el (grep-read-files):
* lisp/progmodes/hideif.el (hide-ifdef-define):
* lisp/progmodes/pascal.el (pascal-goto-defun):
* lisp/progmodes/prolog.el (prolog-read-predicate):
* lisp/progmodes/sql.el (sql-get-login-ext):
* lisp/ses.el (ses-define-local-printer):
* lisp/textmodes/artist.el (artist-figlet-choose-font):
* lisp/textmodes/tex-mode.el (tex-compile):
* lisp/vc/diff.el (diff):
* lisp/vc/ediff-ptch.el (ediff-prompt-for-patch-file):
* lisp/vc/ediff-util.el (ediff-read-file-name):
* lisp/vc/pcvs.el (cvs-mode-mark-on-state):
* lisp/vc/vc.el (vc-diff-build-argument-list-internal)
(vc-revision-other-window, vc-retrieve-tag):
* lisp/wid-edit.el: Prefer format-prompt unconditionally.

* lisp/org/org-capture.el (org-capture-fill-template):
* lisp/org/org-refile.el (org-refile-get-location):
* lisp/progmodes/python.el (python-eldoc-at-point):
* lisp/progmodes/verilog-mode.el (verilog-surelint-off)
(verilog-goto-defun):
* lisp/progmodes/xref.el (xref--read-identifier): Prefer format-prompt
when it is fboundp.

lisp/mail/rmailkwd.el

@@ -74,12 +74,9 @@ according to the choice made, and returns a symbol."
 		(rmail-summary-exists)
 		(and (setq old (rmail-get-keywords))
 		     (mapc #'rmail-make-label (split-string old ", "))))
-	    (completing-read (concat prompt
-				     (if rmail-last-label
-					 (concat " (default "
-						 (symbol-name rmail-last-label)
-						 "): ")
-				       ": "))
+            (completing-read (format-prompt prompt
+                                            (and rmail-last-label
+                                                 (symbol-name rmail-last-label)))
 			     rmail-label-obarray
 			     nil
 			     nil))))

lisp/mail/rmailmm.el

@@ -254,7 +254,7 @@ TRUNCATED is non-nil if the text of this entity was truncated."))
 	(unless (y-or-n-p "This entity is truncated; save anyway? ")
 	  (error "Aborted")))
     (setq filename (expand-file-name
-		    (read-file-name (format "Save as (default: %s): " filename)
+                    (read-file-name (format-prompt "Save as" filename)
 				    directory
 				    (expand-file-name filename directory))
 		    directory))

lisp/mail/rmailout.el

@@ -107,9 +107,8 @@ error: %S\n"
 	 (read-file
 	  (expand-file-name
 	   (read-file-name
-	    (concat "Output message to mail file (default "
-		    (file-name-nondirectory default-file)
-		    "): ")
+            (format-prompt "Output message to mail file"
+                           (file-name-nondirectory default-file))
 	    (file-name-directory default-file)
 	    (abbreviate-file-name default-file))
 	   (file-name-directory default-file))))