Modifying note in symfony#1430 to be shorter

weaverryan · weaverryan · commit 0f2d2ce76702 · 2012-06-13T22:29:44.000-05:00
diff --git a/book/forms.rst b/book/forms.rst
@@ -1280,15 +1280,10 @@ to define form output.
     ever be needed in a single template.
 
     .. caution::
-
-        Templates that do not make use of the extends tag and thereby become 
-        a child of another template will have all of their blocks executed 
-        the moment they are rendered. This has the side-effect of preventing 
-        form_theme from having access to blocks you may be attempting to use 
-        when overriding the default form blocks.
-        
-        In practice, {% form_theme form _self %} should only be used by templates 
-        that do extend a base template.
+    
+        This ``{% form_theme form _self %}`` functionality will *only* work
+        if your template extends another. If your template does not, you
+        must point ``form_theme`` to a separate template.
 
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