HUTN — Excessive indentation due to the blocks used to delimit the package content

Issue : Excessive indentation due to the blocks used to delimit the package contents.
According to the current draft, the top-level definitions of a package instance need to be put inside
a block delimited by open and close brackets. This is not very user-friendly in the sense that it
introduces excessive indentation that could be avoided.
Suggestion for resolution: Use a one-line delimiter convention (such as 'package "xxxxxx";') meaning
that all the above definitions until the next delimiter are part of the package content. Note that the same
kind of notation is found in the Java language to declare packages.
This delimiter convention may be optional or mandatory (to be discussed).

see below