[bug#49671] [PATCH v3] guix: records: Improve error reporting.

[Julien Lepiller]

Here is another improvement compared to v2. This time there are two
patches: the first adds support for &syntax in (guix ui), and will
print something like

in form: <pretty-printed-form>

where "in form" is in green.

The second patch is very similar to v2, but will now also raise a
&syntax condition, so it can be pretty-printed. The previous issue
where I printed #<syntax ...> is fixed, I simply forgot a syntax->datum.

WDYT?

0001-guix-ui-Print-syntax-errors.patch
Description: Text Data

0002-guix-records-Improve-error-reporting.patch
Description: Text Data