Add missing period

uap-dev · uap-dev · commit 8e59ae6a1b7c · 2015-12-04T00:29:12.000-08:00
diff --git a/docs/ARCOptimization.rst b/docs/ARCOptimization.rst
@@ -151,7 +151,7 @@ referent. Consider the following sequence of rules:
     is deallocated.
 
 (3) A different source-level variable pointing at the same referent
-    must not be changed/invalidated by such a call
+    must not be changed/invalidated by such a call.
 
 (4) If such a variable exists, the compiler must guarantee the
     refcount is > 1 going into the call.
