update-w3c-deps: Do not modify testharness tests.

third_party/WebKit/LayoutTests/imported/wpt/html/syntax/serializing-html-fragments/serializing.html

Index: third_party/WebKit/LayoutTests/imported/wpt/html/syntax/serializing-html-fragments/serializing.html
diff --git a/third_party/WebKit/LayoutTests/imported/wpt/html/syntax/serializing-html-fragments/serializing.html b/third_party/WebKit/LayoutTests/imported/wpt/html/syntax/serializing-html-fragments/serializing.html
index 012b91c12c7853f16857780d22f2486c5013cc68..8303901f65205d08d873649fa369a2274d6129d9 100644
--- a/third_party/WebKit/LayoutTests/imported/wpt/html/syntax/serializing-html-fragments/serializing.html
+++ b/third_party/WebKit/LayoutTests/imported/wpt/html/syntax/serializing-html-fragments/serializing.html
@@ -4,7 +4,7 @@
 <script src="/resources/testharnessreport.js"></script>
 <div id="log"></div>
 
-<!--  test elments. Each has an expected innerHTML and outerHTML in an array in the <script> -->
+<!-- test elments. Each has an expected innerHTML and outerHTML in an array in the <script>-->
 <div id="test" style="display:none">
 <span></span>
 <span><a></a></span>
@@ -30,11 +30,11 @@
 <span><noembed><&></noembed></span>
 <span><noframes><&></noframes></span>
 <span><noscript><&></noscript></span>
-<span><!-- data --></span>
+<span><!--data--></span>
 <span><a><b><c></c></b><d>e</d><f><g>h</g></f></a></span>
 <span b=c></span>
 </div>
-<!--  TODO: template element  -->
+<!-- TODO: template element -->
 <script>
 
 var test_data = document.getElementById("test").getElementsByTagName("span");