Apply fixes from StyleCI

src/Duration/Duration.php

@@ -37,7 +37,7 @@ class Duration implements Arrayable, JsonSerializable
     /**
      * Duration constructor.
      *
-     * @param $seconds
+     * @param  $seconds
      */
     public function __construct($seconds = 0)
     {
@@ -77,7 +77,7 @@ public function getSeconds()
     }
 
     /**
-     * @param $format
+     * @param  $format
      * @return $this
      */
     public function setFormat($format)

src/Duration/DurationFormatter.php

@@ -32,7 +32,7 @@ public function __construct(Duration $duration)
     }
 
     /**
-     * @param $format
+     * @param  $format
      * @return mixed
      */
     public function get($format)
@@ -66,7 +66,7 @@ public function get($format)
 
     /**
      * @param  Collection  $units
-     * @param $format
+     * @param  $format
      * @return mixed
      */
     protected function applyFormat(Collection $units, $format)

src/Duration/DurationOperations.php

@@ -25,7 +25,7 @@ public function subtract(Duration $duration)
     /**
      * Retrieve the sum of an array.
      *
-     * @param $items
+     * @param  $items
      * @param  null  $callback
      * @return Duration
      *

src/Period/Period.php

@@ -24,8 +24,8 @@ class Period implements Arrayable, JsonSerializable
     /**
      * TimeSpan constructor.
      *
-     * @param $start
-     * @param $end
+     * @param  $start
+     * @param  $end
      */
     public function __construct($start = null, $end = null)
     {
@@ -114,7 +114,7 @@ public function latest(Carbon $time)
     // _________________________________________________________________________________________________________________
 
     /**
-     * @param $time
+     * @param  $time
      * @return Carbon|null
      */
     protected function normalizeInput($time)
@@ -130,7 +130,7 @@ protected function normalizeInput($time)
     }
 
     /**
-     * @param $time
+     * @param  $time
      * @return Carbon|null
      */
     protected function normalizeOutput($time)

src/Shared/RetrievesValues.php

@@ -7,7 +7,7 @@ trait RetrievesValues
     /**
      * Returns a closure function to retrieve a value from an $item parameter.
      *
-     * @param $callback
+     * @param  $callback
      * @return \Closure
      */
     private static function valueRetriever($callback)

src/Shared/ValidatesArrays.php

@@ -5,8 +5,8 @@
 trait ValidatesArrays
 {
     /**
-     * @param $keys
-     * @param $array
+     * @param  $keys
+     * @param  $array
      *
      * @throws MissingPropertiesException
      */

src/Whitelist/Whitelist.php

@@ -17,7 +17,7 @@ abstract class Whitelist
     protected $value;
 
     /**
-     * @param $value
+     * @param  $value
      */
     public function __construct($value)
     {
@@ -44,7 +44,7 @@ public function get()
     }
 
     /**
-     * @param $value
+     * @param  $value
      * @return bool
      */
     public static function isValid($value)