Remove a useless '\' and enhance a script in an example in the section 'Add entries ... (--add-host)'
Remove a useless '\' and enhance a script in an example in the section 'Add entries ... (--add-host)'

Signed-off-by: Abreto FU <61c9b2b17db77a27841bbeeabff923448b0f6388@abreto.email>

thaJeztah/cli,cpuguy83/cli,docker/cli,docker/cli,cpuguy83/cli,thaJeztah/cli