[core] Apply common indentation

All files are now using tabs for indentation

formats/PlaintextFormat.php

@@ -3,18 +3,18 @@
 * Plaintext
 * Returns $this->items as raw php data.
 */
-class PlaintextFormat extends FormatAbstract{
+class PlaintextFormat extends FormatAbstract {
 
-    public function stringify(){
-        $items = $this->getItems();
-        return print_r($items, true);
-    }
+	public function stringify(){
+		$items = $this->getItems();
+		return print_r($items, true);
+	}
 
-    public function display(){
-        $this
-            ->setContentType('text/plain;charset=' . $this->getCharset())
-            ->callContentType();
+	public function display(){
+		$this
+			->setContentType('text/plain;charset=' . $this->getCharset())
+			->callContentType();
 
-        return parent::display();
-    }
-}
+		return parent::display();
+	}
+}