Improved the warning for the #@ Microsoft charizing operator. The existing one misspelled the token as "@#" and didn't capitalize Microsoft.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@163113 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Basic/DiagnosticLexKinds.td

@@ -55,7 +55,7 @@ def warn_cxx98_compat_no_newline_eof : Warning<
 
 def ext_dollar_in_identifier : Extension<"'$' in identifier">,
   InGroup<DiagGroup<"dollar-in-identifier-extension">>;
-def ext_charize_microsoft : Extension<"@# is a microsoft extension">,
+def ext_charize_microsoft : Extension<"charizing operator #@ is a Microsoft extension">,
   InGroup<Microsoft>;
 
 def ext_token_used : Extension<"extension used">,