longEscapedCmdExpected = concat
    [ "RUN wget https://download.com/${version}.tar.gz -O /tmp/logstash.tar.gz &&  "
    , "(cd /tmp && tar zxf logstash.tar.gz && mv logstash-${version} /opt/logstash &&  "
    , "rm logstash.tar.gz) &&  "
    , "(cd /opt/logstash &&  "
    ,  "/opt/logstash/bin/plugin install contrib)\n"
    , "\n"
    , "\n"
    , "\n"
    , "\n"
    ]
longEscapedCmdExpected = concat
    [ "RUN wget https://download.com/${version}.tar.gz -O /tmp/logstash.tar.gz &&  "
    , "(cd /tmp && tar zxf logstash.tar.gz && mv logstash-${version} /opt/logstash &&  "
    , "rm logstash.tar.gz) &&  "
    , "(cd /opt/logstash &&  "
    ,  "/opt/logstash/bin/plugin install contrib)\n"
    , "\n"
    , "\n"
    , "\n"
    , "\n"
    ]
longEscapedCmdExpected = concat
    [ "RUN wget https://download.com/${version}.tar.gz -O /tmp/logstash.tar.gz &&  "
    , "(cd /tmp && tar zxf logstash.tar.gz && mv logstash-${version} /opt/logstash &&  "
    , "rm logstash.tar.gz) &&  "
    , "(cd /opt/logstash &&  "
    ,  "/opt/logstash/bin/plugin install contrib)\n"
    , "\n"
    , "\n"
    , "\n"
    , "\n"
    ]