Widget Pugin prints an extra unwanted number

Hi, i’m creating a new wordpress widget for outputting images and links in my dynamic sidebar in my theme.

But the widget prints an number at the end.
This is my code :

class text_image_widget extends WP_Widget {
    function __construct() {
        parent::__construct(
            'custom-widget', // Base ID
            __( 'custom-widget', 'text_domain' ), // Name
            array( 'description' => __( 'custom-widget', 'text_domain' ), ) // Args
        );

        add_action('admin_enqueue_scripts', array($this, 'upload_scripts'));
    }

    /**
     * Upload the Javascripts for the media uploader
     */
    public function upload_scripts()
    {
        wp_enqueue_script('media-upload');
        wp_enqueue_script('thickbox');
        wp_enqueue_script('upload_media_widget', plugin_dir_url(__FILE__) . 'upload-media.js', array('jquery'));

        wp_enqueue_style('thickbox');
    }

    /**
     * Front-end display of widget.
     *
     * @see WP_Widget::widget()
     *
     * @param array $args     Widget arguments.
     * @param array $instance Saved values from database.
     */
    public function widget( $args, $instance ) {
    ?>
        <img src="<?= $instance['image'] ?>" alt="" class="img-responsive center-block">
        <h3><?= $instance['title']?></h3>
        <p>
            <?= $instance['body'] ?>
        </p>
        <a href="<?= $instance['link']?>" class="btn btn-white-border">
            Lees meer
        </a>
    <?php
    }

    /**
     * Back-end widget form.
     *
     * @see WP_Widget::form()
     *
     * @param array $instance Previously saved values from database.
     */
    public function form( $instance ) {
        $title = ! empty( $instance['title'] ) ? $instance['title'] : __( 'New title', 'text_domain' );
        ?>
        <p>
            <label for="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>"><?php _e( esc_attr( 'Title:' ) ); ?></label>
            <input class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'title' ) ); ?>" type="text" value="<?php echo esc_attr( $title ); ?>">
        </p>
        <?php

        $body = ! empty( $instance['body'] ) ? $instance['body'] : __( 'New body', 'text_domain' );
        ?>
        <p>
            <label for="<?php echo esc_attr( $this->get_field_id( 'body' ) ); ?>"><?php _e( esc_attr( 'Body:' ) ); ?></label>
            <textarea class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'body' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'body' ) ); ?>" rows="10"><?php echo esc_attr( $body ); ?></textarea>
        </p>
        <?php

        $image = '';
        if(isset($instance['image']))
        {
            $image = $instance['image'];
        }
        ?>
        <p>
            <label for="<?php echo $this->get_field_name( 'image' ); ?>"><?php _e( 'Image:' ); ?></label>
            <input name="<?php echo $this->get_field_name( 'image' ); ?>" id="<?php echo $this->get_field_id( 'image' ); ?>" class="widefat" type="text" size="36"  value="<?php echo esc_url( $image ); ?>" />
            <input class="upload_image_button button button-primary" type="button" value="Upload Image" />
        </p>
        <?php

        $link = ! empty( $instance['link'] ) ? $instance['link'] : __( 'New link', 'text_domain' );
        ?>
        <p>
            <label for="<?php echo esc_attr( $this->get_field_id( 'link' ) ); ?>"><?php _e( esc_attr( 'Lees meer link:' ) ); ?></label>
            <input class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'link' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'link' ) ); ?>" type="text" value="<?php echo esc_attr( $link ); ?>">
        </p>
        <?php
    }

    /**
     * Sanitize widget form values as they are saved.
     *
     * @see WP_Widget::update()
     *
     * @param array $new_instance Values just sent to be saved.
     * @param array $old_instance Previously saved values from database.
     *
     * @return array Updated safe values to be saved.
     */
    public function update( $new_instance, $old_instance ) {
        $instance = array();
        $instance['title'] = ( ! empty( $new_instance['title'] ) ) ? strip_tags( $new_instance['title'] ) : '';
        $instance['body'] = ( ! empty( $new_instance['body'] ) ) ? strip_tags( $new_instance['body'] ) : '';
        $instance['image'] = ( ! empty( $new_instance['image'] ) ) ? strip_tags( $new_instance['image'] ) : '';
        $instance['link'] = ( ! empty( $new_instance['link'] ) ) ? strip_tags( $new_instance['link'] ) : '';

        return $instance;
    }

Where i call it:

<article class="services services-1">
				<?= dynamic_sidebar('dienst1')?>
			</article>

What it prints:

<article class="services services-1">
				        <img src="https://localhost:8888/-----/wordpress/wp-content/uploads/2016/08/message.png" alt="" class="img-responsive center-block">
        <h3>Cursus</h3>
        <p>
            Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras congue, metus non tincidunt ullamcorper, dolor liberdso egestas augue, vel placerat lectus nisi in sapien.        </p>
        <a href="https://localhost:8888/-------------/wordpress/voorbeeld-pagina/" class="btn btn-white-border">
            Lees meer
        </a>
    1			</article>