dpkg-maintscript-helper: Print only once that we are moving a conffile

Move the printing to the final phase, and skip the intermediate message
that we are moving the file aside for later processing. This information
is redundant and really unnecessary. It also does not match the other
actions in the script.

Closes: #747370

debian/changelog

@@ -18,6 +18,8 @@ dpkg (1.17.10) UNRELEASED; urgency=low
     prepend, instead of appending, the " (deleted)" marker in /proc/PID/exe.
     Closes: #731530
   * Move dpkg-architecture -L argument to the Commands --help output section.
+  * Make dpkg-maintscript-helper print only once that we are moving a
+    conffile, and not on every interim state transition. Closes: #747370
 
   [ Updated manpages translations ]
   * German (Helge Kreutzmann).

scripts/dpkg-maintscript-helper.sh

@@ -92,11 +92,8 @@ prepare_rm_conffile() {
 	local old_md5sum="$(dpkg-query -W -f='${Conffiles}' $PACKAGE | \
 		sed -n -e "\' $CONFFILE ' { s/ obsolete$//; s/.* //; p }")"
 	if [ "$md5sum" != "$old_md5sum" ]; then
-		echo "Obsolete conffile $CONFFILE has been modified by you."
-		echo "Saving as $CONFFILE.dpkg-bak ..."
 		mv -f "$CONFFILE" "$CONFFILE.dpkg-backup"
 	else
-		echo "Moving obsolete conffile $CONFFILE out of the way..."
 		mv -f "$CONFFILE" "$CONFFILE.dpkg-remove"
 	fi
 }
@@ -105,6 +102,8 @@ finish_rm_conffile() {
 	local CONFFILE="$1"
 
 	if [ -e "$CONFFILE.dpkg-backup" ]; then
+		echo "Obsolete conffile $CONFFILE has been modified by you."
+		echo "Saving as $CONFFILE.dpkg-bak ..."
 		mv -f "$CONFFILE.dpkg-backup" "$CONFFILE.dpkg-bak"
 	fi
 	if [ -e "$CONFFILE.dpkg-remove" ]; then