`cmark`’s pretty-printer matches our output pretty well, with a few differences:
- it puts a space between the fence and the info string for in code blocks;
- it prefers `-` over `*` for bulleted lists (as do I) and it indents them;
- it `\`-escapes certain chars very conservatively;
- it prefers indented/unfenced code blocks if there is no info string; and
- it prefers `*` over `_` (unlike any sane person).
This also shows how the change fixes a number of issues:
- fix2158-1.output.md also illustrates how this change fixes#1809;
- alias-many.output.md and input-parse-errors.output.md show how fenced
code blocks without an info string would use the beginning of the
content as the info string;
- transcripts-round-trip/main.output.md shows how output blocks for
generated `unison` stanzas (which could contain nested fenced blocks)
might not have long-enough fences; and
- error-messages.output.md and generic-parse-errors.output.md show how
Unison errors were reported on the wrong line number (and thus the
printed error lines were also incorrect).
It seems that optimizations cause problems together with the combination
of coercing and unsafe IO involved in reference equality. I'm not
exactly sure what goes wrong, but it causes segfaults. Defining a
noinline function for the equalities (instead of just `(==)@Reference`)
seems to fix the problem.
I got the same problem to happen for term links, so both of those use a
noinline function now. Other foreign values don't seem to be affected,
which I assume is due to them having pure primitive functions for
equality.
