rubygem-debugger-linecache from openSUSE:Leap:42.2 project

需要 standard ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/openSUSE:Leap:42.2/standard/openSUSE:Leap:42.2.repo
zypper refresh
zypper install rubygem-debugger-linecache