adempiere-last/Dockerfile include blank continuation lines. This causes warnings.

[mckayERP]

Building adempiere-tenant
[WARNING]: Empty continuation line found in:
RUN cd /tmp && tar zxvf /tmp/$ADEMPIERE_BINARY && mv Adempiere /opt/Adempiere && mv lib /opt/Adempiere/lib && mv packages /opt/Adempiere/packages && chmod -Rf 755 /opt/Adempiere/.sh && chmod -Rf 755 /opt/Adempiere/utils/.sh && sed -i "s/ADEMPIERE_HOME=C./ADEMPIERE_HOME=/opt/Adempiere/g" /opt/Adempiere/AdempiereEnvTemplate.properties && sed -i "s/JAVA_HOME=C./JAVA_HOME=/usr/local/openjdk-8/g" /opt/Adempiere/AdempiereEnvTemplate.properties && sed -i "s/ADEMPIERE_JAVA_OPTIONS=-Xms64M -Xmx512M/ADEMPIERE_JAVA_OPTIONS=-Xms1024M -Xmx4096M/g" /opt/Adempiere/AdempiereEnvTemplate.properties && sed -i "s/ADEMPIERE_DB_SERVER=localhost/ADEMPIERE_DB_SERVER=$ADEMPIERE_DB_HOST/g" /opt/Adempiere/AdempiereEnvTemplate.properties && sed -i "s/ADEMPIERE_DB_PORT=5432/ADEMPIERE_DB_PORT=$ADEMPIERE_DB_PORT/g" /opt/Adempiere/AdempiereEnvTemplate.properties && sed -i "s/ADEMPIERE_DB_NAME=adempiere/ADEMPIERE_DB_NAME=$ADEMPIERE_DB_NAME/g" /opt/Adempiere/AdempiereEnvTemplate.properties && sed -i "s/ADEMPIERE_DB_USER=adempiere/ADEMPIERE_DB_USER=$ADEMPIERE_DB_USER/g" /opt/Adempiere/AdempiereEnvTemplate.properties && sed -i "s/ADEMPIERE_DB_PASSWORD=adempiere/ADEMPIERE_DB_PASSWORD=$ADEMPIERE_DB_PASSWORD/g" /opt/Adempiere/AdempiereEnvTemplate.properties && sed -i "s/ADEMPIERE_DB_SYSTEM=postgres/ADEMPIERE_DB_SYSTEM=$ADEMPIERE_DB_ADMIN_PASSWORD/g" /opt/Adempiere/AdempiereEnvTemplate.properties && sed -i "s/ADEMPIERE_KEYSTORE=C*/ADEMPIERE_KEYSTORE=/data/app/Adempiere/keystore/myKeystore/g" /opt/Adempiere/AdempiereEnvTemplate.properties && sed -i "s/ADEMPIERE_WEB_ALIAS=localhost/ADEMPIERE_DB_SYSTEM=$(hostname)/g" /opt/Adempiere/AdempiereEnvTemplate.properties && JAVA_HOME="/usr/local/openjdk-8" && chmod +x /root/define-ad-ctl.sh && sync && /root/define-ad-ctl.sh && sync && cd /opt/Adempiere && cp AdempiereEnvTemplate.properties AdempiereEnv.properties && cp utils/myEnvironmentTemplate.sh utils/myEnvironment.sh && chmod 755 /root/start-adempiere.sh && apt update && apt install -y postgresql-client postgresql-contrib
[WARNING]: Empty continuation lines will become errors in a future release.

This can be fixed simply by removing the blank lines.