Did some cleanup of module001-ch006-overview-horizon-cli

added a space between list and command
added space between name and for
added space between flavor and for
added a space between resize and command
added space between create and command

Change-Id: I07c00046c43a76bdb18e8a24adefeaf342e34c29
Merge "Did some cleanup of module001-ch006-overview-horizon-cli"