Replace "can not" with "cannot" in diagnostics messages.

llvm-svn: 203302
diff --git a/clang/test/Parser/cxx-using-declaration.cpp b/clang/test/Parser/cxx-using-declaration.cpp
index 320fd09..17237a3 100644
--- a/clang/test/Parser/cxx-using-declaration.cpp
+++ b/clang/test/Parser/cxx-using-declaration.cpp
@@ -33,7 +33,7 @@
     template <typename TYPE> int funcE(TYPE arg) { return(arg); }
 }
 
-using E::funcE<int>; // expected-error{{using declaration can not refer to a template specialization}}
+using E::funcE<int>; // expected-error{{using declaration cannot refer to a template specialization}}
 
 namespace F {
     struct X;