test, provide regressions for pri+vol (m+o) and pri+val+vol (m+n+o) adjustments
cosmetics, leave a comment about the purpose of co_appl_adj()
fix, PEBKAC, use the right actor for nominal value upon splits SPLF/SPLR
minor, also maintain market cap, issued cap and market to face ratio in total return adjustment
test, PEBKAC, adhere to invariants for volume and nomval adjustment
Merge branch 'feat/adjust-volume'

* feat/adjust-volume:
  test, PEBKAC, adhere to invariants for volume and nomval adjustment
  minor, also maintain market cap, issued cap and market to face ratio in total return adjustment
  fix, PEBKAC, use the right actor for nominal value upon splits SPLF/SPLR
  cosmetics, leave a comment about the purpose of co_appl_adj()
  test, provide regressions for pri+vol (m+o) and pri+val+vol (m+n+o) adjustments