Issue #15819 has been updated by shevegen (Robert A. Heiler).


> IHMO, it's too difficult to guess proper command.

Agree - File::NULL works in e. g. irb too and should work for ri. I found rdoc/ri
a bit cumbersome to use API-wise; in one project, that displays rdoc documentation
for methods (a bit similar as what pry does), I use code such as this:

    hash = RDoc::RI::Driver.process_args(arguments)
    rdoc_driver = RDoc::RI::Driver.new(hash)

To process stuff. if it were up to me I would try to enhance rdoc in general to be
more "friendly" (simpler) API-wise to use for downstream ruby users in general, but
I digress from your issue, sorry.

----------------------------------------
Bug #15819: cannot read document of File::NULL with "ri File::NULL"
https://bugs.ruby-lang.org/issues/15819#change-77893

* Author: tad (Tadashi Saito)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.6.3p62 (2019-04-16 revision 67580) [x86_64-linux]
* Backport: 2.4: UNKNOWN, 2.5: UNKNOWN, 2.6: UNKNOWN
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