Update comments in fixit tests

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68279 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/fixit.c b/test/Sema/fixit.c
index ca034e9..e9d78c7 100644
--- a/test/Sema/fixit.c
+++ b/test/Sema/fixit.c
@@ -1,10 +1,9 @@
 // RUN: clang -fsyntax-only -pedantic -fixit %s -o - | clang-cc -pedantic -Werror -x c -
 
 /* This is a test of the various code modification hints that are
-   provided as part of warning or extension diagnostics. Eventually,
-   we would like to actually try to perform the suggested
-   modifications and compile the result to test that no warnings
-   remain. */
+   provided as part of warning or extension diagnostics. All of the
+   warnings will be fixed by -fixit, and the resulting file should
+   compile cleanly with -Werror -pedantic. */
 
 void f0(void) { };