[gazebo_ros] Quote arguments to echo in libcommon.sh #590
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If /bin/sh is provided by bash, echo will consume arguments such as `-e`. On such a system, running `rosrun gazebo_ros gzserver -e ode empty_world.world` will execute `gzserver` with the `-e` missing (meaning the world file is ignored).
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If /bin/sh is provided by bash, echo will consume arguments such as
-e. On such a system, runningrosrun gazebo_ros gzserver -e ode empty_world.worldwill executegzserverwith the-emissing (meaning the world file is ignored).