python/skytools: add doctest-based regtests to few non-sql functions

Seems to be better testing method than ad-hoc scripts.  They will
serve as examples too.

Also fix few minor problems found in the process:
- parse_pgarray:  check if str ends with }
- parse_pgarray: support NULL
- quote_fqident: add 'public.' schema to idents without schema
- fq_name_parts: return always list

0 files changed, 0 insertions, 0 deletions