Remove stray character from regex substring grouping

Author: Christophe Pettus <xof@thebuild.com>
Discussion: https://postgr.es/m/BB10E027-775C-4A4E-A602-626370D81338@thebuild.com

Author: danielgustafsson

pgweb/urls.py

@@ -40,7 +40,7 @@
     re_path(r'^about/news/taglist.json/$', pgweb.news.views.taglist_json),
     re_path(r'^about/events/$', pgweb.events.views.main),
     re_path(r'^about/eventarchive/$', pgweb.events.views.archive),
-    re_path(r'^about/event/(?P<itemid>\d+)(<?P<slug>-.*)?/$', pgweb.events.views.item),
+    re_path(r'^about/event/(?P<itemid>\d+)(?P<slug>-.*)?/$', pgweb.events.views.item),
     re_path(r'^about/event/(?P<slug>[^/]+)-(?P<itemid>\d+)/$', pgweb.events.views.item),
     re_path(r'^about/featurematrix/$', pgweb.featurematrix.views.root),
     re_path(r'^about/featurematrix/detail/(\d+)/$', pgweb.featurematrix.views.detail_legacy),