OXYGENHUB

Changes up to # 9935d490ddfb touching docs/revset_query_language.md · 3

See as swimlanes (independent work side by side)

Revsets: trust predicates, and -r on show, verify and abandon
Andy McCall ·
✔ 2c9ddac3c387
Revsets: oxy log -r selects changes by set algebra over history
Andy McCall ·
✔ 47ce8b8e2d4b
Design: revsets (refs #65)
Andy McCall ·
✔ 8ad9dfe16303