template: remove some unnecessary newlines

template/quitesimple/page_creation_preview

@@ -14,4 +14,4 @@ This is a preview of your changes:<br>
 <button type="submit" name="do" value="preview">Preview</button>
 </form>
 </main>
-{qswiki:include:general_footer}
+{qswiki:include:general_footer}