https://git.ruby-lang.org/ruby.git/commit/?id=ad9c713728

From ad9c7137282009bbecae8df8bd5a601311282d62 Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@g...>
Date: Sat, 26 Oct 2019 16:26:48 +0900
Subject: Make `(#methodname)` a link with --hyperlink-all option


diff --git a/lib/rdoc/cross_reference.rb b/lib/rdoc/cross_reference.rb
index 76a4dca..07ba14c 100644
--- a/lib/rdoc/cross_reference.rb
+++ b/lib/rdoc/cross_reference.rb
@@ -76,7 +76,7 @@ class RDoc::CrossReference https://github.com/ruby/ruby/blob/trunk/lib/rdoc/cross_reference.rb#L76
   # Version of CROSSREF_REGEXP used when <tt>--hyperlink-all</tt> is specified.
 
   ALL_CROSSREF_REGEXP = /
-                     (?:^|\s)
+                     (?:^|[\s()])
                      (
                       (?:
                        # A::B::C.meth
-- 
cgit v0.10.2


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