GridView typo fixed

framework/grid/GridView.php

@@ -416,7 +416,7 @@ class GridView extends BaseListView
 	protected function createDataColumn($text)
 	{
 		if (!preg_match('/^([\w\.]+)(:(\w*))?(:(.*))?$/', $text, $matches)) {
-			throw new InvalidConfigException('The column must be specified in the format of "attribute", "attribute:format" or "attribute:format:label');
+			throw new InvalidConfigException('The column must be specified in the format of "attribute", "attribute:format" or "attribute:format:label"');
 		}
 		return Yii::createObject([
 			'class' => $this->dataColumnClass ?: DataColumn::className(),