Improve the description #3336

Author: dpcat237

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

@@ -3,6 +3,6 @@ compound
 
 **type**: ``boolean``
 
-This option define that if form is compound. It's independent of whether the
-form actually has children. A form can be compound and have no children at all,
-like for example an empty collection form.
+This option specifies if a form is compound. This is independent of whether the
+form actually has children. A form can be compound but don't have any children
+at all (e.g. an empty collection form).