[TASK] Update RenderSvgViewHelper

Classes/ViewHelpers/RenderSvgViewHelper.php

@@ -41,6 +41,7 @@ class RenderSvgViewHelper extends AbstractTagBasedViewHelper {
 	 * @api
 	 */
 	protected $tagName = 'svg';
+	protected $xmlInfo = '<?xml version="1.0"?>';
 
 	/**
 	 * @var array
@@ -192,7 +193,7 @@ class RenderSvgViewHelper extends AbstractTagBasedViewHelper {
 		}
 
 		if ($createNewInstance) {
-			return $svg->asXML();
+			return str_replace($this->xmlInfo, '', $svg->asXML());
 		}
 
 		// Extract the SVG contents
@@ -206,7 +207,7 @@ class RenderSvgViewHelper extends AbstractTagBasedViewHelper {
 				$use->addAttribute('href', '#' . $id);
 			}
 
-			return $svg->asXML();
+			return str_replace($this->xmlInfo, '', $svg->asXML());
 		}
 
 		// Add the unique ID to the list of rendered SVGs
@@ -216,13 +217,13 @@ class RenderSvgViewHelper extends AbstractTagBasedViewHelper {
 		$group = $svg->addChild('g');
 		// The boolean conversion of  SimpleXMLElement is broken, therefore we MUST explicitly check against null
 		if ($group === NULL) {
-			return $svg->asXML();
+			return str_replace($this->xmlInfo, '', $svg->asXML());
 		}
 
 		$group->addAttribute('id', $id);
 		$this->xmlAdopt($group, $contentsElement);
 
-		return $svg->asXML();
+		return str_replace($this->xmlInfo, '', $svg->asXML());
 	}
 
 	/**