Merge pull request #36 from mpsijm/patch-1

Fix typo in vnext: is -> if

source/release/note/vnext.rst

@@ -12,6 +12,6 @@ Changes
 Stratego
 ~~~~~~~~
 
-Stratego has two new reserved words: ``cast`` and ``is``. Local variables can be reserved words is they start with ``'``, so you can use ``'cast`` and ``'is``. 
+Stratego has two new reserved words: ``cast`` and ``is``. Local variables can be reserved words if they start with ``'``, so you can use ``'cast`` and ``'is``. 
 
 Under the Stratego language options in your ``metaborg.yaml`` file you can turn on the gradual type system, if you use the incremental compiler. This option is ``gradual: static``, and only tests the types statically. The default is ``gradual: none`` right now, meaning the gradual type system is not on by default. There is an experimental third option ``gradual: dynamic`` which not only checks the types statically but also inserts casts to check types dynamically where necessary.