ex_doc from home:Ledest:erlang:21 project
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添加软件源并手动安装
对于 openSUSE Leap 15.5，请以根用户 root 运行下面命令：
zypper addrepo https://download.opensuse.org/repositories/home:Ledest:erlang:21/openSUSE_Leap_15.5/home:Ledest:erlang:21.repo zypper refresh zypper install ex_doc