Ruby on Rails - unable to convert "\x89" from ASCII-8BIT to UTF-8 for xxx/xxxx/xxxx
You need to update / install a version of the rdoc gem that supports the conversion. Then these errors won't appear during generation of the documentation when you install rails or when you regenerate the documentation.
gem install rdocThen to regenerate the documentation
gem rdoc --all --overwrite
Set such environment variables before you do install:
export LANGUAGE=en_US.UTF-8export LANG=en_US.UTF-8export LC_ALL=en_US.UTF-8
If you prefer using online documentation to using rdoc and ri, then you can avoid these errors and speed up your installs by skipping the rdoc and ri installations. Michael Hartl recommends this in his book. Just add a .gemrc file to your home directory with the following contents:
install: --no-rdoc --no-riupdate: --no-rdoc --no-ri