Bug 1564657 [wpt PR 17549] - Fix bad placeholder string in Preload + SRI tests, a=testonly

Automatic update from web-platform-tests
Fix bad placeholder string in Preload + SRI tests

R=yhirano@chromium.org

Bug: 677022
Change-Id: Iac6114a810417c115e92aaa7cfb0c2b978d563f2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1679139
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: Dominic Farolino <dom@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672834}

--

wpt-commits: d9d459e7578c23b68865a02b8465c390d9025448
wpt-pr: 17549

testing/web-platform/tests/resources/sriharness.js

@@ -76,7 +76,9 @@ const SRIPreloadTest = (preload_sri_success, subresource_sri_success, name,
 
   // Early-fail in UAs that do not support `preload` links.
   test.step_func(() => {
-    assert_true(link.relList.supports('preload'), "Clever message here.");
+    assert_true(link.relList.supports('preload'),
+      "This test is automatically failing because the browser does not" +
+      "support `preload` links.");
   })();
 
   // Build up the link.