Remove some non-ascii characters. Thanks Gabor.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64330 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Basic/DiagnosticSemaKinds.def

@@ -870,7 +870,7 @@ DIAG(error_bad_receiver_type, ERROR,
 DIAG(warn_objc_throw_expects_object, WARNING,
      "invalid %0 argument (expected an ObjC object type)")
 DIAG(error_rethrow_used_outside_catch, ERROR,
-     "‘@throw’ (rethrow) used outside of a @catch block")
+     "@throw (rethrow) used outside of a @catch block")
 
 
 // C++ casts

test/SemaObjC/try-catch.m

@@ -39,5 +39,5 @@ typedef struct _NSZone NSZone;
 
 int foo() {
   @throw 42; // expected-warning {{invalid 'int' argument (expected an ObjC object type)}}
-  @throw; // expected-error {{‘@throw’ (rethrow) used outside of a @catch block}}
+  @throw; // expected-error {{@throw (rethrow) used outside of a @catch block}}
 }