improve diagnostics in call parsing, patch suggested by
Matthijs Kooijman


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49648 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/tutorial/LangImpl7.html b/docs/tutorial/LangImpl7.html
index 6d82fa9..fc8f130 100644
--- a/docs/tutorial/LangImpl7.html
+++ b/docs/tutorial/LangImpl7.html
@@ -1286,7 +1286,7 @@
       if (CurTok == ')') break;
       
       if (CurTok != ',')
-        return Error("Expected ')'");
+        return Error("Expected ')' or ',' in argument list");
       getNextToken();
     }
   }