Improve the error message slightly for files that aren't using the expected UTF-8 encoding.  Patch by Seth Cantrell.

llvm-svn: 148991
diff --git a/clang/test/Lexer/string-literal-encoding.c b/clang/test/Lexer/string-literal-encoding.c
index c92f7bb..b12cfab 100644
--- a/clang/test/Lexer/string-literal-encoding.c
+++ b/clang/test/Lexer/string-literal-encoding.c
@@ -5,11 +5,11 @@
 // U+00F5 U+00FC
 
 void f() {
-    wchar_t const *a = L"Àéîõü"; // expected-error {{illegal sequence in string literal}}
+    wchar_t const *a = L"Àéîõü"; // expected-error {{illegal character encoding in string literal}}
 
-    char16_t const *b = u"Àéîõü"; // expected-error {{illegal sequence in string literal}}
-    char32_t const *c = U"Àéîõü"; // expected-error {{illegal sequence in string literal}}
-    wchar_t const *d = LR"(Àéîõü)"; // expected-error {{illegal sequence in string literal}}
-    char16_t const *e = uR"(Àéîõü)"; // expected-error {{illegal sequence in string literal}}
-    char32_t const *f = UR"(Àéîõü)"; // expected-error {{illegal sequence in string literal}}
+    char16_t const *b = u"Àéîõü"; // expected-error {{illegal character encoding in string literal}}
+    char32_t const *c = U"Àéîõü"; // expected-error {{illegal character encoding in string literal}}
+    wchar_t const *d = LR"(Àéîõü)"; // expected-error {{illegal character encoding in string literal}}
+    char16_t const *e = uR"(Àéîõü)"; // expected-error {{illegal character encoding in string literal}}
+    char32_t const *f = UR"(Àéîõü)"; // expected-error {{illegal character encoding in string literal}}
 }