newline before the first context" and "shuffle 0-width spaces around so
they are distributed more evenly"

This reverts commits e3c56f9e and
7fc1124c, which are workarounds for
Coq bug https://coq.inria.fr/bugs/show_bug.cgi?id=4675

Also, this commit fixes the levels to avoid parantheses.

Pros:
* It does not matter how editors render the 0-width space, everything is always aligned
* In ProofGeneral, there is no more incorrectn indentation of the first line

Cons:
* There is an empty line between the bar ending the Coq context, and the first Iris hypothesis

This reverts commit 3cc38ff6.

The reverted pure hypotheses and variables appear in the wrong order.