Fixed installation error on Ruby repository.

hsbt · hsbt · commit 1ba4a5a8df72 · 2017-09-12T14:23:25.000+09:00
diff --git a/rdoc.gemspec b/rdoc.gemspec
@@ -1,4 +1,10 @@
-require_relative "lib/rdoc"
+# -*- encoding: utf-8 -*-
+begin
+  require_relative "lib/rdoc"
+rescue LoadError
+  # for Ruby repository
+  require_relative "../rdoc"
+end
 
 Gem::Specification.new do |s|
   s.name = "rdoc"
