/usr/share/ri/1.8/system/RubyToken/ is in ri1.8 1.8.7.352-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/ri/1.8/system/RubyToken/TkError/
/usr/share/ri/1.8/system/RubyToken/TkError/cdesc-TkError.yaml
/usr/share/ri/1.8/system/RubyToken/TkId/
/usr/share/ri/1.8/system/RubyToken/TkId/cdesc-TkId.yaml
/usr/share/ri/1.8/system/RubyToken/TkId/new-c.yaml
/usr/share/ri/1.8/system/RubyToken/TkKW/
/usr/share/ri/1.8/system/RubyToken/TkKW/cdesc-TkKW.yaml
/usr/share/ri/1.8/system/RubyToken/TkNode/
/usr/share/ri/1.8/system/RubyToken/TkNode/cdesc-TkNode.yaml
/usr/share/ri/1.8/system/RubyToken/TkNode/new-c.yaml
/usr/share/ri/1.8/system/RubyToken/TkOPASGN/
/usr/share/ri/1.8/system/RubyToken/TkOPASGN/cdesc-TkOPASGN.yaml
/usr/share/ri/1.8/system/RubyToken/TkOPASGN/new-c.yaml
/usr/share/ri/1.8/system/RubyToken/TkOp/
/usr/share/ri/1.8/system/RubyToken/TkOp/cdesc-TkOp.yaml
/usr/share/ri/1.8/system/RubyToken/TkOp/name-i.yaml
/usr/share/ri/1.8/system/RubyToken/TkUnknownChar/
/usr/share/ri/1.8/system/RubyToken/TkUnknownChar/cdesc-TkUnknownChar.yaml
/usr/share/ri/1.8/system/RubyToken/TkUnknownChar/new-c.yaml
/usr/share/ri/1.8/system/RubyToken/TkVal/
/usr/share/ri/1.8/system/RubyToken/TkVal/cdesc-TkVal.yaml
/usr/share/ri/1.8/system/RubyToken/TkVal/new-c.yaml
/usr/share/ri/1.8/system/RubyToken/Token/
/usr/share/ri/1.8/system/RubyToken/Token-i.yaml
/usr/share/ri/1.8/system/RubyToken/Token/cdesc-Token.yaml
/usr/share/ri/1.8/system/RubyToken/Token/new-c.yaml
/usr/share/ri/1.8/system/RubyToken/Token/set_text-i.yaml
/usr/share/ri/1.8/system/RubyToken/cdesc-RubyToken.yaml
/usr/share/ri/1.8/system/RubyToken/def_token-c.yaml
/usr/share/ri/1.8/system/RubyToken/set_token_position-i.yaml