Issue #3023 has been updated by Marc-Andre Lafortune.

File rdoc_url.patch added

I've attached a patch for this.

Note that the test_rdoc_markup_to_html_crossref makes the issue #3169 I just posted quite obvious. I changed the test only to fit the new naming scheme, and marked the wrong assertions accordingly.
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http://redmine.ruby-lang.org/issues/show/3023

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