fix

Author: cristoforocervino

reference/forms/types/options/form_attr.rst.inc

@@ -15,6 +15,6 @@ You can also set this to ``true`` on a root form to automatically set the "form"
 
 .. note::
 
-    When root the form has no ID, ``form_attr`` is required to be a string identifier to be used as the form ID.
+    When the root form has no ID, ``form_attr`` is required to be a string identifier to be used as the form ID.
 
 .. _`"form" attribute`: https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#attr-fae-form