Fixed some trailing whitespace

$ shopt -s globstar
 $ sed -i 's/[ \t]*$//' src/pocketmine/*/**.php

:P

src/pocketmine/level/Location.php

@@ -61,7 +61,7 @@ class Location extends Position{
 
 	/**
 	 * Return a Location instance
-	 * 
+	 *
 	 * @return Location
 	 */
 	public function asLocation() : Location{

src/pocketmine/level/Position.php

@@ -50,13 +50,13 @@ class Position extends Vector3{
 
 	/**
 	 * Return a Position instance
-	 * 
+	 *
 	 * @return Position
 	 */
 	public function asPosition() : Position{
 		return new Position($this->x, $this->y, $this->z, $this->level);
 	}
-	
+
 	/**
 	 * Returns the target Level, or null if the target is not valid.
 	 * If a reference exists to a Level which is closed, the reference will be destroyed and null will be returned.

src/pocketmine/math/Vector3.php

@@ -163,7 +163,7 @@ class Vector3{
 
 	/**
 	 * Return a Vector3 instance
-	 * 
+	 *
 	 * @return Vector3
 	 */
 	public function asVector3() : Vector3{

src/pocketmine/tile/Sign.php

@@ -64,7 +64,7 @@ class Sign extends Spawnable{
 
 		return true;
 	}
-	
+
 	/**
 	 * @param int    $index 0-3
 	 * @param string $line
@@ -79,7 +79,7 @@ class Sign extends Spawnable{
 			$this->onChanged();
 		}
 	}
-	
+
 	/**
 	 * @param int $index 0-3
 	 *

src/pocketmine/utils/Color.php

@@ -29,7 +29,7 @@ class Color{
 
 	/** @var int */
 	protected $a, $r, $g, $b;
-	
+
 	public function __construct(int $r, int $g, int $b, int $a = 0xff){
 		$this->r = $r & 0xff;
 		$this->g = $g & 0xff;