add extra new lines to descriptor formatting

[lrlna]

1. adds extra new lines to all descriptors, i.e.

Fetching SDL from rover-adventure@current using credentials from the adventure profile.
SDL:

type Cat {
  id: ID!
  name: String
}

type Query {
  cat(id: ID!): Cat
  cats: [Cat]
}

2. Schema Hash descriptor and the actual schema hash are one lined (screenshot at the bottom).
3. Adds an extra white space after triangle when displaying graph publish diff, as it was very much overlapping.