GH-50766: [CI][Dev] Fix shellcheck errors in the ci/scripts/r_docker_configure.sh - #50767

GH-50766: [CI][Dev] Fix shellcheck errors in the ci/scripts/r_docker_configure.sh#50767

kou merged 2 commits into

apache:mainapache/arrow:mainfrom

hiroyuki-sato:topic/shellcheck-r_docker_configurehiroyuki-sato/arrow:topic/shellcheck-r_docker_configureCopy head branch name to clipboard