Revert "merged branch gajdaw/finder_splfileinfo_fpassthu (PR #4751)" …

…(closes #6224)

This reverts commit 5608c0c3ee21e6aade3170d6c580bf7ad452a143, reversing
changes made to 38c30b71bd2d32ac31920996480d1706402118f2.

Conflicts:
	src/Symfony/Component/Finder/SplFileInfo.php

SplFileInfo.php

@@ -62,10 +62,14 @@ public function getRelativePathname()
      */
     public function getContents()
     {
-        $file = new \SplFileObject($this->getRealpath(), 'rb');
-        ob_start();
-        $file->fpassthru();
+        $level = error_reporting(0);
+        $content = file_get_contents($this->getRealpath());
+        error_reporting($level);
+        if (false === $content) {
+            $error = error_get_last();
+            throw new \RuntimeException($error['message']);
+        }
 
-        return ob_get_clean();
+        return $content;
     }
 }