Fix #2352: return raw usernames in API instead of pretty names.

app/models/artist_version.rb

@@ -109,6 +109,6 @@ class ArtistVersion < ActiveRecord::Base
   end
 
   def updater_name
-    User.id_to_name(updater_id).tr("_", " ")
+    User.id_to_name(updater_id)
   end
 end

app/models/note.rb

@@ -124,7 +124,7 @@ class Note < ActiveRecord::Base
   end
 
   def creator_name
-    User.id_to_name(creator_id).tr("_", " ")
+    User.id_to_name(creator_id)
   end
 
   def update_post

app/models/post.rb

@@ -1000,7 +1000,7 @@ class Post < ActiveRecord::Base
     end
 
     def uploader_name
-      User.id_to_name(uploader_id).tr("_", " ")
+      User.id_to_name(uploader_id)
     end
   end
 

app/models/wiki_page.rb

@@ -166,7 +166,7 @@ class WikiPage < ActiveRecord::Base
   end
 
   def creator_name
-    User.id_to_name(creator_id).tr("_", " ")
+    User.id_to_name(creator_id)
   end
 
   def category_name