Be more consistent in using register-read-with-preview to read registers

* frameset.el (frameset-to-register):
* kmacro.el (kmacro-to-register):
* register.el (increment-register):
* calc/calc-yank.el (calc-copy-to-register, calc-insert-register)
(calc-append-to-register, calc-prepend-to-register):
* play/gametree.el (gametree-layout-to-register)
(gametree-apply-register-layout):
* textmodes/picture.el (picture-clear-rectangle-to-register)
(picture-yank-rectangle-from-register):
* vc/emerge.el (emerge-combine-versions-register):
Use register-read-with-preview to read registers.

* cedet/semantic/senator.el (senator-copy-tag-to-register):
Use register-read-with-preview, if available.

* calculator.el, emulation/viper-cmd.el: Comments.

1 files changed, 6 insertions, 2 deletions

diff --git a/lisp/vc/emerge.el b/lisp/vc/emerge.el
index af13665fc2a..0cf4484aac1 100644
--- a/lisp/vc/emerge.el
+++ b/lisp/vc/emerge.el
@@ -2516,8 +2516,12 @@ for how the template is interpreted.
 Refuses to function if this difference has been edited, i.e., if it is
 neither the A nor the B variant.
 An argument forces the variant to be selected even if the difference has
-been edited."
-  (interactive "cRegister containing template: \nP")
+been edited.
+
+Interactively, reads the register using `register-read-with-preview'."
+  (interactive (list
+                (register-read-with-preview "Register containing template: ")
+                current-prefix-arg))
   (let ((template (get-register char)))
     (if (not (stringp template))
         (error "Register does not contain text"))