使用主题定制器的意外输出

我正在为主题定制器设置textarea输入。除了在textarea标签上方输出一行文本之外，它似乎工作得很好，我找不到它的来源和原因。

Theme customizer settings

在这个屏幕截图中，标签Sätiön toiminta上方是文本data-customize-setting-link=\'textarea_setting\' 这是自动生成的。

Function

function mytheme_customize_register( $wp_customize ) {
    require_once(TEMPLATEPATH . \'/inc/customizer_classes/wp_customizer_textarea.php\');

    $wp_customize->add_setting(\'textarea_setting\', array(
                               \'default\' => \'default text\',
                               \'transport\' => \'refresh\'
                               ));

    $wp_customize->add_section( \'Mytheme_content\' , array(
        \'title\'      => __( \'Site content\', \'Mytheme\' ),
        \'priority\'   => 30,
    ) );

    $wp_customize->add_control(new Mytheme_Textarea_Control($wp_customize, \'textarea_setting\', array(
        \'label\' => \'Säätiön toiminta\',
        \'section\' => \'Mytheme_content\',
        \'settings\' => \'textarea_setting\'
    )));
}
add_action( \'customize_register\', \'mytheme_customize_register\' );

wp_customizer_textarea.php

class Mytheme_Textarea_Control extends WP_Customize_Control {
    public $type = \'textarea\';
    public function render_content() {
        echo \'<label>
        <span class="customize-control-title">\' . esc_html( $this->label ) . \'</span>
        <textarea rows="5" style="width:100%;" \' . $this->link() . \'>\' . esc_textarea( $this->value() ) . \'</textarea>
    </label>\';
    }
}

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