Debug shortcode setting v2.5.15 unreleased with Stable Tag 2.5.10.

Needs to be shared on the Forum as a follow-up ASAP in several threads.
This is another bug introduced while linting the codebase after 2.5.10.
= 2.5.15 =
- Bugfix: Dashboard: General settings: Footnote start and end short codes: debug select box for shortcodes with pointy brackets.
- Update: Dashboard: General settings: Footnote start and end short codes: add information about pointy brackets.

git-svn-id: https://plugins.svn.wordpress.org/footnotes/trunk@2503174 b8457f37-d9ea-0310-8a92-e5e31aec5664

class/dashboard/layout.php

@@ -458,11 +458,11 @@ abstract class MCI_Footnotes_Layout_Engine {
 	 * Returns the html tag for a select box.
 	 *
 	 * @since  1.5.0
-	 * 
-	 * - Bugfix: Dashboard: Backlink symbol: debug select box by reverting identity check to equality check, thanks to @lolzim bug report.
-	 * 
+	 *
+	 * - Bugfix: Dashboard: Referrers and tooltips: Backlink symbol: debug select box by reverting identity check to equality check, thanks to @lolzim bug report.
+	 *
 	 * @reporter @lolzim
-	 * 
+	 *
 	 * @since 2.5.13
 	 * @param string $p_str_setting_name  Name of the Settings key to pre select the current value.
 	 * @param array  $p_arr_options       Possible options to be selected.
@@ -478,9 +478,9 @@ abstract class MCI_Footnotes_Layout_Engine {
 			$l_str_options .= sprintf(
 				'<option value="%s" %s>%s</option>',
 				$l_str_value,
-				
-				// Only check for equality, not identity, WRT arrows.
-				$l_str_value == $l_arr_data['value'] ? 'selected' : '',
+				// Now we need to escape the data, WRT shortcodes with pointy brackets.
+				// Only check for equality, not identity, WRT backlink symbol arrows.
+				$l_str_value == htmlspecialchars( $l_arr_data['value'] ) ? 'selected' : '',
 				$l_str_caption
 			);
 		}