Update expression_language.rst

Change comment explication for "IGNORE_*" flags

Author: kl3sk

components/expression_language.rst

@@ -125,7 +125,7 @@ This is how you can use these flags::
 
     $expressionLanguage = new ExpressionLanguage();
 
-    // this returns null because the unknown variables and functions are ignored, but don't throw `SyntaxError` exception
+    // Does not throw a SyntaxError because the unknown variables and functions are ignored
     $expressionLanguage->lint('unknown_var + unknown_function()', [], Parser::IGNORE_UNKNOWN_VARIABLES | Parser::IGNORE_UNKNOWN_FUNCTIONS);
 
 .. versionadded:: 7.1