Currently the kdumpctl script doesn't handle whitespaces (including TABs) which might be there before an option name in the kdump.conf
v1 was posted on Fedora kexec-tools list on Aug 24th: https://lists.fedoraproject.org/archives/list/kexec@lists.fedoraproject.org/thread/GY666XQCYNDQN6SYGY5WMAA5P6A54PJW/
v2 was posted on Fedora kexec-tools list on Aug 25th: https://lists.fedoraproject.org/archives/list/kexec@lists.fedoraproject.org/thread/LO2AKKRSFCZUMUUIMVQ5TNKVWPNW7QSF/
v3 was posted on Fedora kexec-tools list today: https://lists.fedoraproject.org/archives/list/kexec@lists.fedoraproject.org/thread/GEFJP2WLBAVZK4ZRVKA4MPC2K57TCPSH/