Index: src/wp-admin/plugin-editor.php
===================================================================
--- src/wp-admin/plugin-editor.php	(revision 53513)
+++ src/wp-admin/plugin-editor.php	(working copy)
@@ -167,10 +167,12 @@
 
 	if ( ! empty( $functions ) ) {
 		$docs_select  = '<select name="docs-list" id="docs-list">';
-		$docs_select .= '<option value="">' . __( 'Function Name&hellip;' ) . '</option>';
+		$docs_select .= '<option value="">' . esc_html__( 'Function Name&hellip;' ) . '</option>';
+
 		foreach ( $functions as $function ) {
 			$docs_select .= '<option value="' . esc_attr( $function ) . '">' . esc_html( $function ) . '()</option>';
 		}
+
 		$docs_select .= '</select>';
 	}
 }
Index: src/wp-admin/theme-editor.php
===================================================================
--- src/wp-admin/theme-editor.php	(revision 53513)
+++ src/wp-admin/theme-editor.php	(working copy)
@@ -164,12 +164,16 @@
 	if ( '.php' === substr( $file, strrpos( $file, '.' ) ) ) {
 		$functions = wp_doc_link_parse( $content );
 
-		$docs_select  = '<select name="docs-list" id="docs-list">';
-		$docs_select .= '<option value="">' . esc_attr__( 'Function Name&hellip;' ) . '</option>';
-		foreach ( $functions as $function ) {
-			$docs_select .= '<option value="' . esc_attr( urlencode( $function ) ) . '">' . htmlspecialchars( $function ) . '()</option>';
+		if ( ! empty( $functions ) ) {
+			$docs_select  = '<select name="docs-list" id="docs-list">';
+			$docs_select .= '<option value="">' . esc_html__( 'Function Name&hellip;' ) . '</option>';
+
+			foreach ( $functions as $function ) {
+				$docs_select .= '<option value="' . esc_attr( $function ) . '">' . esc_html( $function ) . '()</option>';
+			}
+
+			$docs_select .= '</select>';
 		}
-		$docs_select .= '</select>';
 	}
 
 	$content = esc_textarea( $content );