[Form] Fixed a typo in AbstractType phpdoc

src/Symfony/Component/Form/AbstractType.php

@@ -24,7 +24,7 @@ abstract class AbstractType implements FormTypeInterface
     /**
      * Builds the form.
      *
-     * This method gets called for each type in the hierarchy starting form the
+     * This method gets called for each type in the hierarchy starting from the
      * top most type.
      * Type extensions can further modify the form.
      *
@@ -40,7 +40,7 @@ abstract class AbstractType implements FormTypeInterface
     /**
      * Builds the form view.
      *
-     * This method gets called for each type in the hierarchy starting form the
+     * This method gets called for each type in the hierarchy starting from the
      * top most type.
      * Type extensions can further modify the view.
      *
@@ -56,7 +56,7 @@ abstract class AbstractType implements FormTypeInterface
     /**
      * Builds the form view.
      *
-     * This method gets called for each type in the hierarchy starting form the
+     * This method gets called for each type in the hierarchy starting from the
      * top most type.
      * Type extensions can further modify the view.
      *