I have installed Ruby through the RubyInstaller, which didn't include the ri documentation. Then I rebuilt it through rdoc --all --ri. But when I try to use it, I get weird chars like:
C:\Ruby>ri Array
←[0m←[1;32mArray < Object←[m
(from ~/.ri)
------------------------------------------------------------------------------
←[1;32mInstance methods:←[m
abbrev, dclone, pretty_print, pretty_print_cycle, shelljoin, to_csv,
to_yaml, yaml_initialize
C:\Ruby>
Try ri -f plain Array
. The arrows are escape sequences used to display colors.