wiki pages: normalize unicode in other names.

app/models/wiki_page.rb

@@ -170,7 +170,7 @@ class WikiPage < ApplicationRecord
   end
 
   def normalize_other_names
-    normalized_other_names = other_names.to_s.gsub(/\u3000/, " ").scan(/\S+/)
+    normalized_other_names = other_names.to_s.unicode_normalize(:nfkc).scan(/[^[:space:]]+/)
     self.other_names = normalized_other_names.uniq.join(" ")
   end
 

test/unit/wiki_page_test.rb

@@ -61,6 +61,11 @@ class WikiPageTest < ActiveSupport::TestCase
         assert_equal("hot_potato", @wiki_page.title)
       end
 
+      should "normalize its other names" do
+        @wiki_page.update(:other_names => "foo*bar baz baz 加賀（艦これ）")
+        assert(%w[foo*bar baz 加賀(艦これ)], @wiki_page.other_names_array)
+      end
+
       should "search by title" do
         matches = WikiPage.titled("hot potato")
         assert_equal(1, matches.count)