Use same string in definition as in ui

modules/gui/qt4/ui/sprefs_interface.ui

@@ -589,7 +589,7 @@
       <item row="0" column="1">
        <widget class="QCheckBox" name="EnqueueOneInterfaceMode">
         <property name="text">
-         <string>Enqueue items in playlist in one instance mode</string>
+         <string>Enqueue items into playlist in one instance mode</string>
         </property>
        </widget>
       </item>

src/libvlc-module.c

@@ -1094,7 +1094,7 @@ static const char *const ppsz_prefres[] = {
     "might require a reboot of your machine.")
 
 #define PLAYLISTENQUEUE_TEXT N_( \
-    "Enqueue items to playlist into one instance mode")
+    "Enqueue items into playlist in one instance mode")
 #define PLAYLISTENQUEUE_LONGTEXT N_( \
     "When using the one instance only option, enqueue items to playlist " \
     "and keep playing current item.")