A number of our test fixtures were previously using the non-idiomatic form
of including a single child attribute all on one line with the block
header and bounding braces.
This non-idiomatic form is an error in HCL2, and hclfmt has always "fixed"
it to the expected form of each attribute being on a line of its own, and
so here we just update all the affected test fixtures to canonical form
(using hclfmt), allowing them to be parsed as intended.
Since the these entire files were processed with hclfmt, there are some
other unrelated style changes included in situations where the file
layouts were non-idiomatic in other ways.
Because CBD now runs after a RootTransformer, it's now operating on a
graph that _may_ have had a graphNodeRoot added to it (a noop node whose
only purpose is to be a root).
CBD includes a step that tells the destroy node to depend on any parents
of the create node. When one of those parents was "root", this was
causing the destroy node to depend on "root", making it cease to be an
actual root node.
Because graphNodeRoot is a singleton, the follow-up RootTransformer was
not sufficient to slap another root on top - it wasn't being seen as a
fresh node, so edges were just accumulating, and we ended up in a state
with "no roots".
refs #1903 (not sure if this will fix all the "no root found" cases, or
just the one I bumped into)