Since we only support Jewel and later releases, which both support
object-map and fast-diff, enabling/disabling object-map should always
enable/disable fast-diff.
Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com>
/bin/bash is a Linuxism. Other operating systems install bash to
different paths. Use /usr/bin/env in shebangs to find bash.
Signed-off-by: Alan Somers <asomers@gmail.com>
