Make AutolinkFilter smarter about trailing punctuation

lib/banzai/filter/autolink_filter.rb

@@ -26,7 +26,7 @@ module Banzai
       # in the generated link.
       #
       # Rubular: http://rubular.com/r/cxjPyZc7Sb
-      LINK_PATTERN = %r{([a-z][a-z0-9\+\.-]+://\S+)(?<!,|\.)}
+      LINK_PATTERN = %r{([a-z][a-z0-9\+\.-]+://\S+)(?<![,."':?!&)<>])}
       # Text matching LINK_PATTERN inside these elements will not be linked
       IGNORE_PARENTS = %w(a code kbd pre script style).to_set

spec/lib/banzai/filter/autolink_filter_spec.rb

@@ -130,6 +130,15 @@ describe Banzai::Filter::AutolinkFilter, lib: true do
       doc = filter("See #{link}...")
       expect(doc.at_css('a').text).to eq link
+
+      doc = filter("See #{link}\"")
+      expect(doc.at_css('a').text).to eq link
+
+      doc = filter("See #{link}'")
+      expect(doc.at_css('a').text).to eq link
+
+      doc = filter("See #{link})")
+      expect(doc.at_css('a').text).to eq link
     end
     it 'does not include trailing HTML entities' do