static/frontend/vuln: fix credits list display

Fix a bug in which the first two credits of a vuln report
were displayed with no separation.

Change-Id: I1f42268d8d6e03341e8e1b5db09d16beb7188f8f
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/581180
Reviewed-by: Damien Neil <dneil@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
kokoro-CI: kokoro <noreply+kokoro@google.com>
Run-TryBot: Tatiana Bradley <tatianabradley@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
diff --git a/static/frontend/vuln/entry/entry.tmpl b/static/frontend/vuln/entry/entry.tmpl
index 901f060..0ccb356 100644
--- a/static/frontend/vuln/entry/entry.tmpl
+++ b/static/frontend/vuln/entry/entry.tmpl
@@ -116,7 +116,7 @@
     <h2>Credits</h2>
     <ul>
       <li>
-        {{range $i, $v := .}}{{if gt $i 1}}, {{end}}{{$v.Name}}{{end}}
+        {{range $i, $v := .}}{{if gt $i 0}}, {{end}}{{$v.Name}}{{end}}
       </li>
     </ul>
   {{end}}
diff --git a/tests/screentest/testdata/ci/vuln-entry-no-packages-540x1080.a.png b/tests/screentest/testdata/ci/vuln-entry-no-packages-540x1080.a.png
index ddae279..814d225 100644
--- a/tests/screentest/testdata/ci/vuln-entry-no-packages-540x1080.a.png
+++ b/tests/screentest/testdata/ci/vuln-entry-no-packages-540x1080.a.png
Binary files differ
diff --git a/tests/screentest/testdata/ci/vuln-entry-no-packages.a.png b/tests/screentest/testdata/ci/vuln-entry-no-packages.a.png
index 6f613c7..caf1ce8 100644
--- a/tests/screentest/testdata/ci/vuln-entry-no-packages.a.png
+++ b/tests/screentest/testdata/ci/vuln-entry-no-packages.a.png
Binary files differ