Add line-breaks to gnt-instance manpage
Add line-breaks to gnt-instance manpage

Reviewed-by: ultrotter


apyrgio/ganeti,leshchevds/ganeti,mbakke/ganeti,dimara/ganeti,mbakke/ganeti,bitemyapp/ganeti,yiannist/ganeti,onponomarev/ganeti,apyrgio/snf-ganeti,mbakke/ganeti,ganeti/ganeti,ganeti/ganeti,leshchevds/ganeti,leshchevds/ganeti,yiannist/ganeti,ganeti-github-testing/ganeti-test-1,yiannist/ganeti,andir/ganeti,ganeti-github-testing/ganeti-test-1,andir/ganeti,dimara/ganeti,apyrgio/ganeti,grnet/snf-ganeti,grnet/snf-ganeti,apyrgio/snf-ganeti,andir/ganeti,onponomarev/ganeti,bitemyapp/ganeti,ganeti/ganeti