- Remove earlier comments from previous upgrade
- Add CPP to silence a bunch of warnings

By adjusting the paren addition code, 9.10 exactprint uses spans for
delta calcs, we can keep them

Down to 19 failures

Drops to 17/86

whitespace, commenting debug bits

now 13/86

12/86

11/86

When we finalise the templates, do makeDeltaAst for all variants.

This fixes Types2 and Parens tests, but breaks

Readme1
Types3
Types4

We need the patterns to be located, to not replace the original when
matching.

Down to 6/86

Brings it to 5/86 remaining failures

This is used to filter out potential matches in the file the query
originates in.

But often we have had to re-arrange it with deltas at the point of
matching, so can no longer easily extract it from the pattern to be
matched.

Instead we store it explicitly when making a Query

Still 5/86 failures, but fewer failing instances in PatternSyn2

This sorts out surrounding spacing.

Down to 4/86

Down to 3/86

Recursion /is/ needed, because we are moving things around at this
level, the child nodes may need re-arranging as a result

Still 3/86, but they all relate to comments. I think.

Which has made most exactprint transform functions pure, rather than
in TransFormT.