Allow @ at the end of an URL (#31124)

config/initializers/twitter_regex.rb

@@ -9,7 +9,7 @@ module Twitter::TwitterText
 
   class Regex
     REGEXEN[:valid_general_url_path_chars] = /[^\p{White_Space}<>()?]/iou
-    REGEXEN[:valid_url_path_ending_chars] = /[^\p{White_Space}()?!*"'「」<>;:=,.$%\[\]~&|@]|(?:#{REGEXEN[:valid_url_balanced_parens]})/iou
+    REGEXEN[:valid_url_path_ending_chars] = /[^\p{White_Space}()?!*"'「」<>;:=,.$%\[\]~&|]|(?:#{REGEXEN[:valid_url_balanced_parens]})/iou
     REGEXEN[:valid_url_balanced_parens] = /
       \(
         (?:

spec/lib/text_formatter_spec.rb

@@ -224,6 +224,14 @@ RSpec.describe TextFormatter do
       end
     end
 
+    context 'when given a URL with trailing @ symbol' do
+      let(:text) { 'https://gta.fandom.com/wiki/TW@ Content' }
+
+      it 'matches the full URL' do
+        expect(subject).to include 'href="https://gta.fandom.com/wiki/TW@"'
+      end
+    end
+
     context 'when given a URL containing unsafe code (XSS attack, visible part)' do
       let(:text) { 'http://example.com/b<del>b</del>' }