Allow slashes in slash command arguments

Signed-off-by: Rémy Coutable <remy@rymai.me>

changelogs/unreleased/28329-allow-slash-in-slash-command-args.yml

+---
+title: Allow slashes in slash command arguments
+merge_request:
+author:

lib/gitlab/slash_commands/extractor.rb

@@ -103,7 +103,7 @@ module Gitlab
               (?<cmd>#{Regexp.union(names)})
               (?:
                 [ ]
-                (?<arg>[^\/\n]*)
+                (?<arg>[^\n]*)
               )?
               (?:\n|$)
             )

spec/lib/gitlab/slash_commands/extractor_spec.rb

@@ -81,6 +81,14 @@ describe Gitlab::SlashCommands::Extractor do
           let(:original_msg) { "/assign @joe\nworld" }
           let(:final_msg) { "world" }
         end
+
+        it 'allows slash in command arguments' do
+          msg = "/assign @joe / @jane\nworld"
+          msg, commands = extractor.extract_commands(msg)
+
+          expect(commands).to eq [['assign', '@joe / @jane']]
+          expect(msg).to eq 'world'
+        end
       end
 
       context 'in the middle of content' do