Fix comments around test harness generation

Author: rasendubi

src/libsyntax/test.rs

@@ -327,7 +327,7 @@ fn mk_main(cx: &mut TestCtxt<'_>) -> P<ast::Item> {
     // Writing this out by hand with 'ignored_span':
     //        pub fn main() {
     //            #![main]
-    //            test::test_main_static(::std::os::args().as_slice(), &[..tests]);
+    //            test::test_main_static(&[..tests]);
     //        }
     let sp = ignored_span(cx, DUMMY_SP);
     let ecx = &cx.ext_cx;

src/libsyntax_ext/test.rs

@@ -86,7 +86,7 @@ pub fn expand_test_or_bench(
         cx.path(sp, vec![test_id, cx.ident_of(name)])
     };
 
-    // creates test::$name
+    // creates test::ShouldPanic::$name
     let should_panic_path = |name| {
         cx.path(sp, vec![test_id, cx.ident_of("ShouldPanic"), cx.ident_of(name)])
     };