diff --git a/Carousel.php b/Carousel.php
index 40291a2..90fe0bd 100644
--- a/Carousel.php
+++ b/Carousel.php
@@ -117,9 +117,9 @@ class Carousel extends Widget
 
     /**
      * Renders a single carousel item
-     * @param  string|array           $item  a single item from [[items]]
-     * @param  integer                $index the item index as the first item should be set to `active`
-     * @return string                 the rendering result
+     * @param string|array $item a single item from [[items]]
+     * @param integer $index the item index as the first item should be set to `active`
+     * @return string the rendering result
      * @throws InvalidConfigException if the item is invalid
      */
     public function renderItem($item, $index)
diff --git a/Collapse.php b/Collapse.php
index b8fb97c..c4f42ca 100644
--- a/Collapse.php
+++ b/Collapse.php
@@ -98,10 +98,10 @@ class Collapse extends Widget
 
     /**
      * Renders a single collapsible item group
-     * @param  string                 $header a label of the item group [[items]]
-     * @param  array                  $item   a single item from [[items]]
-     * @param  integer                $index  the item index as each item group content must have an id
-     * @return string                 the rendering result
+     * @param string $header a label of the item group [[items]]
+     * @param array $item a single item from [[items]]
+     * @param integer $index the item index as each item group content must have an id
+     * @return string the rendering result
      * @throws InvalidConfigException
      */
     public function renderItem($header, $item, $index)
diff --git a/Dropdown.php b/Dropdown.php
index 8109add..fa8f178 100644
--- a/Dropdown.php
+++ b/Dropdown.php
@@ -62,8 +62,8 @@ class Dropdown extends Widget
 
     /**
      * Renders menu items.
-     * @param  array                  $items the menu items to be rendered
-     * @return string                 the rendering result.
+     * @param array $items the menu items to be rendered
+     * @return string the rendering result.
      * @throws InvalidConfigException if the label option is not specified in one of the items.
      */
     protected function renderItems($items)
diff --git a/Nav.php b/Nav.php
index a215914..fb9e560 100644
--- a/Nav.php
+++ b/Nav.php
@@ -136,8 +136,8 @@ class Nav extends Widget
 
     /**
      * Renders a widget's item.
-     * @param  string|array           $item the item to render.
-     * @return string                 the rendering result.
+     * @param string|array $item the item to render.
+     * @return string the rendering result.
      * @throws InvalidConfigException
      */
     public function renderItem($item)
@@ -211,7 +211,7 @@ class Nav extends Widget
      * as the route for the item and the rest of the elements are the associated parameters.
      * Only when its route and parameters match [[route]] and [[params]], respectively, will a menu item
      * be considered active.
-     * @param  array   $item the menu item to be checked
+     * @param array $item the menu item to be checked
      * @return boolean whether the menu item is active
      */
     protected function isItemActive($item)
diff --git a/NavBar.php b/NavBar.php
index ab681d1..af41725 100644
--- a/NavBar.php
+++ b/NavBar.php
@@ -62,7 +62,7 @@ class NavBar extends Widget
     public $brandLabel;
     /**
      * @param array|string $url the URL for the brand's hyperlink tag. This parameter will be processed by [[Url::to()]]
-     *                          and will be used for the "href" attribute of the brand link. If not set, [[\yii\web\Application::homeUrl]] will be used.
+     * and will be used for the "href" attribute of the brand link. If not set, [[\yii\web\Application::homeUrl]] will be used.
      */
     public $brandUrl;
     /**
diff --git a/Progress.php b/Progress.php
index ec0827a..1c466f6 100644
--- a/Progress.php
+++ b/Progress.php
@@ -112,7 +112,7 @@ class Progress extends Widget
 
     /**
      * Renders the progress.
-     * @return string                 the rendering result.
+     * @return string the rendering result.
      * @throws InvalidConfigException if the "percent" option is not set in a stacked progress bar.
      */
     protected function renderProgress()
@@ -135,10 +135,10 @@ class Progress extends Widget
 
     /**
      * Generates a bar
-     * @param  integer $percent the percentage of the bar
-     * @param  string  $label,  optional, the label to display at the bar
-     * @param  array   $options the HTML attributes of the bar
-     * @return string  the rendering result.
+     * @param integer $percent the percentage of the bar
+     * @param string $label, optional, the label to display at the bar
+     * @param array $options the HTML attributes of the bar
+     * @return string the rendering result.
      */
     protected function renderBar($percent, $label = '', $options = [])
     {
diff --git a/Tabs.php b/Tabs.php
index 7c7274a..b5669f6 100644
--- a/Tabs.php
+++ b/Tabs.php
@@ -120,7 +120,7 @@ class Tabs extends Widget
 
     /**
      * Renders tab items as specified on [[items]].
-     * @return string                  the rendering result.
+     * @return string the rendering result.
      * @throws InvalidConfigException.
      */
     protected function renderItems()
@@ -192,9 +192,9 @@ class Tabs extends Widget
     /**
      * Normalizes dropdown item options by removing tab specific keys `content` and `contentOptions`, and also
      * configure `panes` accordingly.
-     * @param  array                  $items the dropdown items configuration.
-     * @param  array                  $panes the panes reference array.
-     * @return boolean                whether any of the dropdown items is `active` or not.
+     * @param array $items the dropdown items configuration.
+     * @param array $panes the panes reference array.
+     * @return boolean whether any of the dropdown items is `active` or not.
      * @throws InvalidConfigException
      */
     protected function renderDropdown(&$items, &$panes)