Bug 474964 - comment nodes screw up the tab bar. r=gavin

browser/base/content/tabbrowser.xml

@@ -2922,11 +2922,11 @@
                               clicktoscroll="true"
 #endif
                               class="tabbrowser-arrowscrollbox">
-            <!-- This is a hack to circumvent bug 472020, otherwise the tabs show
-                 up on the right of the newtab button. -->
+# This is a hack to circumvent bug 472020, otherwise the tabs show up on the
+# right of the newtab button.
             <children includes="tab"/>
-            <!-- This is to ensure anything extensions put here will go before
-                 the newtab button, necessary due to the previous hack -->
+# This is to ensure anything extensions put here will go before the newtab
+# button, necessary due to the previous hack.
             <children/>
             <xul:toolbarbutton class="tabs-newtab-button"
                                command="cmd_newNavigatorTab" chromedir="&locale.dir;"