[ClassLoader] Removing trailing whitespaces

src/Composer/Autoload/ClassLoader.php

@@ -180,7 +180,7 @@ class ClassLoader
 
         $classPath .= str_replace('_', DIRECTORY_SEPARATOR, $className) . '.php';
 
-        foreach ($this->prefixes as $prefix => $dirs) {    
+        foreach ($this->prefixes as $prefix => $dirs) {
             if (0 === strpos($class, $prefix)) {
                 foreach ($dirs as $dir) {
                     if (file_exists($dir . DIRECTORY_SEPARATOR . $classPath)) {