From 01a6ab1a659d2f66355ae902262b4a9d36090a69 Mon Sep 17 00:00:00 2001
From: Patrick Fung <patrick.fung@ryerson.ca>
Date: Wed, 4 Mar 2020 13:46:09 -0500
Subject: [PATCH] fix undefined variable

---
 rl-collapsible-section.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/rl-collapsible-section.php b/rl-collapsible-section.php
index 8ffd19a..26ba75e 100644
--- a/rl-collapsible-section.php
+++ b/rl-collapsible-section.php
@@ -7,7 +7,7 @@
  * Author URI: https://github.com/ryersonlibrary
  * Description: Adds the [rl_collapsible_section] shortcode to WordPress.
  * GitHub Plugin URI: https://github.com/ryersonlibrary/rl-collapsible-section
- * Version: 0.1.9
+ * Version: 0.1.10
  */
 
 // Include our custom settings page for the plugin
@@ -72,7 +72,7 @@ function rl_collapsible_section_shortcode($atts = [], $content = null) {
 add_shortcode('rl_collapsible_section', 'rl_collapsible_section_shortcode');
 
 // [rl_collapsible_section_toggle_button] shortcode
-function rl_collapsible_section_toggle_button_shortcode() {
+function rl_collapsible_section_toggle_button_shortcode($atts = []) {
   // normalize attribute keys, lowercase
   $atts = array_change_key_case((array)$atts, CASE_LOWER);