typeable-ids-as-enum-cycle.patch

diff --git a/lib/plugins/defaults/stdout.rb b/lib/plugins/defaults/stdout.rb
index 53f61d1..2a0fb18 100644
--- a/lib/plugins/defaults/stdout.rb
+++ b/lib/plugins/defaults/stdout.rb
@@ -28,7 +28,7 @@ config.plugins.stdout.set_default(:time_format_not_today, '%y/%m/%d %H:%M')
 config.plugins.stdout.set_default(:enable_pager, false)
 config.plugins.stdout.set_default(:pager, 'less -R -f +G')
 config.plugins.stdout.set_default(:window_height, 50)
-config.plugins.stdout.set_default(:typable_ids, ('aa'..'zz').to_a)
+config.plugins.stdout.set_default(:typable_ids, ('aa'..'zz').cycle)
 config.plugins.stdout.set_default(:typable_id_prefix, '$')
 config.plugins.stdout.set_default(:show_reply_chain, true)
 config.plugins.stdout.set_default(:indent_format, %q("#{'    ' * (indent - 1)}  → "))
@@ -39,23 +39,17 @@ config.plugins.stdout.set_default(
 module Termtter
   class TypableIdGenerator
     def initialize(ids)
-      if not ids.kind_of?(Array)
-        raise ArgumentError, 'ids should be an Array'
-      elsif ids.empty?
-        raise ArgumentError, 'ids should not be empty'
-      end
       @ids = ids
       @table = {}
       @rtable = {}
     end
 
     def next(data)
-      id = @ids.shift
-      @ids.push id
-      @rtable.delete(@table[id])
-      @table[id] = data
-      @rtable[data] = id
-      id
+      @ids.next.tap do |id|
+        @rtable.delete(@table[id])
+        @table[id] = data
+        @rtable[data] = id
+      end
     end
 
     def get(id)