My computer runs Windows 7.
I type “rdoc person.rb” in command prompt.
It returns “No newer files.”
A folder named ‘doc’ is created in the current directory, but it doesn’t
contain any file.
I type “rdoc person.rb” in command prompt again.
"uh-oh! RDoc had a problem:
Directory doc already exists, but it looks like it isn’t an RDoc
Because RDoc doesn’t want to risk destroying any of your existing files,
you’ll need to specify a different output directory name (using the --op
run with --debug for full backtrace"