Automated native_function_invocation fixes

src/Spout/Writer/Exception/Border/InvalidWidthException.php

@@ -11,6 +11,6 @@ class InvalidWidthException extends WriterException
     {
         $msg = '%s is not a valid width identifier for a border. Valid identifiers are: %s.';
 
-        parent::__construct(sprintf($msg, $name, implode(',', BorderPart::getAllowedWidths())));
+        parent::__construct(\sprintf($msg, $name, \implode(',', BorderPart::getAllowedWidths())));
     }
 }