RubyGems 2.0.2 installed
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package.rb, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package/tar_header.rb, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package/tar_reader.rb, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package/tar_reader/entry.rb, skipping
unable to convert U+00E1 from UTF-8 to US-ASCII for lib/rubygems/package/tar_writer.rb, skipping
unable to convert U+201C from UTF-8 to US-ASCII for lib/rubygems/specification.rb, skipping
Installing ri documentation for rubygems-2.0.2
ERROR: While executing gem ... (ArgumentError)
invalid byte sequence in US-ASCII