How to enable From Ruby Site Ri Docs

use the following command to enable From Ruby Site Ri missing documentation.

gem rdoc –all –ri –no-rdoc

rvm docs generate all

Now if you issue #ri String (you can see

= String < Object

——————————————————————————
= Includes:
Comparable (from ruby site)

(from ruby site)
——————————————————————————
BigDecimal extends the native String class to provide the #to_d method.

When you require BigDecimal in your application, this method will be available
on String objects.

additions to class String for Unicode normalization

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