wayneeseguin/rvm — comment on commit b09c7b52db1a4997b35d28da67de395d9f8873d7
File:  line 0
By fullbridge-batkins:

Not necessarily true. It could be an installation of jruby or ree (ruby enterprise edition) or something else. Most of the time you're correct in that normal ruby installations have the ruby specifier but I think it's a good think to differentiate between regular ruby vs. alternative distributions.