_content/tour: point to contribution guide for reporting issues

The feedback button makes it a bit too easy to file a new issue without
being prompted to first check if same issue has already been reported.

Try pointing to the Go contribution guide and its "check the issue
tracker" section, and see how that goes. The intent is that if someone
wishes to provide feedback, it's still possible to do that, and
hopefully the less immediate path to the issue tracker makes it more
likely that reporters prefer to find (and upvote and/or subscribe to)
an existing issue whenever it already exists.

Change-Id: I2343711530cf89982fb8725a791b19b5ee5e4a14
Reviewed-on: https://go-review.googlesource.com/c/website/+/708756
Reviewed-by: Dmitri Shuralyov <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Carlos Amedee <[email protected]>
Auto-Submit: Dmitri Shuralyov <[email protected]>

Author: dmitshur

_content/tour/static/js/directives.js

@@ -221,10 +221,16 @@ directive('feedbackButton', ['i18n', function(i18n) {
             scope.feedbackMessage = i18n.l('submit-feedback');
 
             elm.on('click', function() {
+                var customURL = i18n.l('custom-feedback-url');
+                if (customURL && customURL !== '(no translation for custom-feedback-url)') {
+                    window.open(customURL);
+                    return;
+                }
+
                 var context = window.location.pathname === '/tour/list'
                     ? '/tour/list'
                     : '/tour/' + scope.params.lessonId + '/' + scope.params.pageNumber;
-	        context = window.location.protocol + '//' + window.location.host + context;
+                context = window.location.protocol + '//' + window.location.host + context;
                 var title = i18n.l('issue-title');
                 var body = i18n.l('context') + ': '+ context + '\n\n'+ i18n.l('issue-message');
                 var url = 'https://' + i18n.l('github-repo') + '/issues/new'

_content/tour/static/js/values.js

@@ -54,6 +54,8 @@ value('translation', {
     'submit-feedback': 'Send feedback about this page',
 
     // GitHub issue template: update repo and messaging when translating.
+    // If a custom-feedback-url is set, it takes higher precedence over other fields.
+    'custom-feedback-url': '/doc/contribute#check_tracker',
     'github-repo': 'github.com/golang/go',
     'issue-title': 'x/website/_content/tour: [REPLACE WITH SHORT DESCRIPTION]',
     'issue-message': 'Change the title above to describe your issue and add your feedback here, including code if necessary',