page 323, paragraph 4, line 2 : $rdoc ?
will likely use approximately never, see $rdoc --help for a full rundown.
The dollar prompt should be removed or separated by a blank, because the command is rdoc --help and is already in the special font for code literal.
+++++ in Using RDoc to Create Documentation for ri, paragraph 6, line 2 : easiest instead of easier ???
own use, it’s easiest to use the --ri option, which installs the documentation into ~/.rdoc:
-----> ^^^^^^^
Can we say “it’s easiest”, not “it’s easier” ?