I've noticed that many builtin Ruby classes don't have descriptions:

$ ri --system String -T | head -10
---------------------------------------------------------- Class: String
     (no description...)
------------------------------------------------------------------------

Includes:
     Comparable(<, <=, ==, >, >=, between?), Enumerable(all?, any?,
     collect, detect, each_cons, each_slice, each_with_index, entries,
     enum_cons, enum_slice, enum_with_index, find, find_all, grep,
     include?, inject, inject, map, max, member?, min, partition,
     reject, select, sort, sort_by, to_a, to_set, zip)
$ ri --system Array -T | head -10
----------------------------------------------------------- Class: Array
     (no description...)
------------------------------------------------------------------------

Includes:
     Enumerable(all?, any?, collect, detect, each_cons, each_slice,
     each_with_index, entries, enum_cons, enum_slice, enum_with_index,
     find, find_all, grep, include?, inject, inject, map, max, member?,
     min, partition, reject, select, sort, sort_by, to_a, to_set, zip)


Also the necessity of using --system parameter all the time is quite annoying!

-- 
Kent
---
http://www.datanoise.com