Update expression_language.rst

Sync with last commits

Author: kl3sk

components/expression_language.rst

@@ -104,6 +104,8 @@ if the expression is not valid::
     // displays the AST nodes of the expression which can be
     // inspected and manipulated
 
+    $expressionLanguage->lint('1 + 2', []); // doesn't throw anything
+
     $expressionLanguage->lint('1 + a', []);
     // Throw SyntaxError Exception
     // "Variable "a" is not valid around position 5 for expression `1 + a`."