machine: Fixed formatting in AVAILABLE_DRIVER_PLUGINS.md. (#3175)
machine: Fixed formatting in AVAILABLE_DRIVER_PLUGINS.md. (#3175)


docker/docker.github.io,thaJeztah/docker.github.io,JimGalasyn/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,shubheksha/docker.github.io,thaJeztah/docker.github.io,londoncalling/docker.github.io,londoncalling/docker.github.io,shubheksha/docker.github.io,docker/docker.github.io,JimGalasyn/docker.github.io,anweiss/docker.github.io,shin-/docker.github.io,anweiss/docker.github.io,shin-/docker.github.io,shin-/docker.github.io,johnstep/docker.github.io,docker/docker.github.io,shin-/docker.github.io,docker/docker.github.io,anweiss/docker.github.io,johnstep/docker.github.io,londoncalling/docker.github.io,johnstep/docker.github.io,anweiss/docker.github.io,shubheksha/docker.github.io,anweiss/docker.github.io,JimGalasyn/docker.github.io,londoncalling/docker.github.io,londoncalling/docker.github.io,johnstep/docker.github.io,thaJeztah/docker.github.io,shubheksha/docker.github.io,shubheksha/docker.github.io,docker/docker.github.io,JimGalasyn/docker.github.io,shin-/docker.github.io,johnstep/docker.github.io,JimGalasyn/docker.github.io