rebase from live enviornment

wp/plugins/woocommerce/templates/emails/plain/email-customer-details.php

@@ -0,0 +1,26 @@
+<?php
+/**
+ * Additional Customer Details (plain)
+ *
+ * This is extra customer data which can be filtered by plugins. It outputs below the order item table.
+ *
+ * This template can be overridden by copying it to yourtheme/woocommerce/emails/plain/email-customer-details.php.
+ *
+ * HOWEVER, on occasion WooCommerce will need to update template files and you
+ * (the theme developer) will need to copy the new files to your theme to
+ * maintain compatibility. We try to do this as little as possible, but it does
+ * happen. When this occurs the version of the template file will be bumped and
+ * the readme will list any important changes.
+ *
+ * @see     https://woo.com/document/template-structure/
+ * @package WooCommerce\Templates\Emails\Plain
+ * @version 3.4.0
+ */
+
+defined( 'ABSPATH' ) || exit;
+
+echo esc_html( wc_strtoupper( esc_html__( 'Customer details', 'woocommerce' ) ) ) . "\n\n";
+
+foreach ( $fields as $field ) {
+	echo wp_kses_post( $field['label'] ) . ': ' . wp_kses_post( $field['value'] ) . "\n";
+}