diff --git a/framework/base/Module.php b/framework/base/Module.php
index 8657848afe..6406dafd95 100644
--- a/framework/base/Module.php
+++ b/framework/base/Module.php
@@ -39,7 +39,7 @@ class Module extends ServiceLocator
 {
     /**
      * @event ActionEvent an event raised before executing a controller action.
-     * You may set [[ActionEvent::isValid]] to be false to cancel the action execution.
+     * You may set [[ActionEvent::isValid]] to be `false` to cancel the action execution.
      */
     const EVENT_BEFORE_ACTION = 'beforeAction';
     /**
@@ -62,7 +62,7 @@ class Module extends ServiceLocator
     /**
      * @var string|boolean the layout that should be applied for views within this module. This refers to a view name
      * relative to [[layoutPath]]. If this is not set, it means the layout value of the [[module|parent module]]
-     * will be taken. If this is false, layout will be disabled within this module.
+     * will be taken. If this is `false`, layout will be disabled within this module.
      */
     public $layout;
     /**
@@ -140,7 +140,7 @@ class Module extends ServiceLocator
 
     /**
      * Returns the currently requested instance of this module class.
-     * If the module class is not currently requested, null will be returned.
+     * If the module class is not currently requested, `null` will be returned.
      * This method is provided so that you access the module instance from anywhere within the module.
      * @return static|null the currently requested instance of this module class, or null if the module class is not requested.
      */
@@ -153,7 +153,7 @@ class Module extends ServiceLocator
     /**
      * Sets the currently requested instance of this module class.
      * @param Module|null $instance the currently requested instance of this module class.
-     * If it is null, the instance of the calling class will be removed, if any.
+     * If it is `null`, the instance of the calling class will be removed, if any.
      */
     public static function setInstance($instance)
     {
@@ -332,7 +332,7 @@ class Module extends ServiceLocator
      * @param string $id module ID (case-sensitive). To retrieve grand child modules,
      * use ID path relative to this module (e.g. `admin/content`).
      * @param boolean $load whether to load the module if it is not yet loaded.
-     * @return Module|null the module instance, null if the module does not exist.
+     * @return Module|null the module instance, `null` if the module does not exist.
      * @see hasModule()
      */
     public function getModule($id, $load = true)
@@ -368,7 +368,7 @@ class Module extends ServiceLocator
      * - a [[Module]] object
      * - a configuration array: when [[getModule()]] is called initially, the array
      *   will be used to instantiate the sub-module
-     * - null: the named sub-module will be removed from this module
+     * - `null`: the named sub-module will be removed from this module
      */
     public function setModule($id, $module)
     {
@@ -381,7 +381,7 @@ class Module extends ServiceLocator
 
     /**
      * Returns the sub-modules in this module.
-     * @param boolean $loadedOnly whether to return the loaded sub-modules only. If this is set false,
+     * @param boolean $loadedOnly whether to return the loaded sub-modules only. If this is set `false`,
      * then all sub-modules registered in this module will be returned, whether they are loaded or not.
      * Loaded modules will be returned as objects, while unloaded modules as configuration arrays.
      * @return array the modules (indexed by their IDs)
@@ -476,11 +476,11 @@ class Module extends ServiceLocator
      *    or `abc\def\XyzController` class within the [[controllerNamespace|controller namespace]].
      *
      * If any of the above steps resolves into a controller, it is returned together with the rest
-     * part of the route which will be treated as the action ID. Otherwise, false will be returned.
+     * part of the route which will be treated as the action ID. Otherwise, `false` will be returned.
      *
      * @param string $route the route consisting of module, controller and action IDs.
      * @return array|boolean If the controller is created successfully, it will be returned together
-     * with the requested action ID. Otherwise false will be returned.
+     * with the requested action ID. Otherwise `false` will be returned.
      * @throws InvalidConfigException if the controller class and its file do not match.
      */
     public function createController($route)
@@ -535,7 +535,7 @@ class Module extends ServiceLocator
      * Note that this method does not check [[modules]] or [[controllerMap]].
      *
      * @param string $id the controller ID
-     * @return Controller the newly created controller instance, or null if the controller ID is invalid.
+     * @return Controller the newly created controller instance, or `null` if the controller ID is invalid.
      * @throws InvalidConfigException if the controller class and its file name do not match.
      * This exception is only thrown when in debug mode.
      */