Avoided to show mount lines again after -dummy umount

xorriso-dd-target/xorriso-dd-target

@@ -260,7 +260,7 @@ plug_in_watcher() {
 
 # <<< Mock-up to save USB socket wear-off by erasing items from old_device_list
 # <<< Their presence in new_device_list will let them appear as fresh plugs
-# old_device_list=' '$(echo -n $old_device_list | sed -e 's/sde//')' '
+# old_device_list=' '$(echo -n $old_device_list | sed -e 's/sdc//')' '
 
   echo "Found and noted as _not_ desired: $old_device_list" >&2
   echo >&2
@@ -570,11 +570,14 @@ write_image() {
     done
 
     # Check again if any mount points still exist
-    list_mounted_of "$2"
-    if test -n "$mounted_devs" -a -z "$dummy_run"
+    if test -z "$dummy_run"
     then
-      echo "FAILURE: $sudo_cmd $umount_cmd could not remove all mounts: $mounted_devs" >&2
-      return 7
+      list_mounted_of "$2"
+      if test -n "$mounted_devs"
+      then
+        echo "FAILURE: $sudo_cmd $umount_cmd could not remove all mounts: $mounted_devs" >&2
+        return 7
+      fi
     fi
   fi
 
@@ -587,9 +590,9 @@ write_image() {
   then
     echo "  $sudo_cmd $dd_cmd if='${1}' bs=1M of=/dev/${2} ; sync"
   else
-    echo "--- not activated yet ---"
-    echo "Would do:   $sudo_cmd $dd_cmd if='${1}' bs=1M of=/dev/${2} ; sync"
-    echo "--- not activated yet ---"
+    echo "Performing:"
+    echo "  $sudo_cmd $dd_cmd if='${1}' bs=1M of=/dev/${2} ; sync"
+#   $sudo_cmd $dd_cmd if='${1}' bs=1M of=/dev/${2} ; sync
   fi
 
   # >>> ??? Erase possible GPT backup table at end of device ?
@@ -651,7 +654,7 @@ then
     then
       if test -n "$do_plug_test"
       then
-        echo
+        echo >&2
         echo "Step 3:" >&2
         if test -n "$dummy_run"
         then