diff -u b/core/modules/outside_in/css/off-canvas.base.css b/core/modules/outside_in/css/off-canvas.base.css
--- b/core/modules/outside_in/css/off-canvas.base.css
+++ b/core/modules/outside_in/css/off-canvas.base.css
@@ -1,4 +1,4 @@
-/*
+/**
  * @file
  * Set base styles for the settings tray.
  */
diff -u b/core/modules/outside_in/css/off-canvas.button.css b/core/modules/outside_in/css/off-canvas.button.css
--- b/core/modules/outside_in/css/off-canvas.button.css
+++ b/core/modules/outside_in/css/off-canvas.button.css
@@ -1,4 +1,5 @@
 /**
+ * @file
  * Visual styling for buttons in the off canvas tray.
  *
  * See seven/css/components/buttons.css
diff -u b/core/modules/outside_in/css/off-canvas.theme.css b/core/modules/outside_in/css/off-canvas.theme.css
--- b/core/modules/outside_in/css/off-canvas.theme.css
+++ b/core/modules/outside_in/css/off-canvas.theme.css
@@ -1,3 +1,8 @@
+/**
+ * @file
+ * Styling for the off-canvas ui dialog. Including overrides for jQuery UI.
+ */
+
 /* Style the dialog-off-canvas container. */
 .ui-dialog.ui-dialog-off-canvas {
   background: #444;
diff -u b/core/modules/outside_in/js/outside_in.es6.js b/core/modules/outside_in/js/outside_in.es6.js
--- b/core/modules/outside_in/js/outside_in.es6.js
+++ b/core/modules/outside_in/js/outside_in.es6.js
@@ -60,10 +60,10 @@
   }
 
   /**
-   *  Helper to switch edit mode state.
+   * Helper to switch edit mode state.
    *
    * @param {boolean} editMode
-   *  True enable edit mode, false disable edit mode.
+   *   True enable edit mode, false disable edit mode.
    */
   function setEditModeState(editMode) {
     if (!document.querySelector('[data-off-canvas-main-canvas]')) {
@@ -135,7 +135,7 @@
    * @todo don't use a class for this.
    *
    * @return {boolean}
-   *  State of the outside-in edit mode.
+   *   State of the outside-in edit mode.
    */
   function isInEditMode() {
     return $('#toolbar-bar').hasClass('js-outside-in-edit-mode');