gnucash maint: [ifrs-cost-basis] use truth table to interpret stock transaction

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/502ad361 (commit)
	from  https://github.com/Gnucash/gnucash/commit/8a80993f (commit)



commit 502ad361a6ae428ccc9ab2a9ccdbbab407d01c41
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Wed Sep 29 23:29:06 2021 +0800

    [ifrs-cost-basis] use truth table to interpret stock transaction
    
    use truth table which encodes negative/zero/positive amounts for
    various accounts involved in a stock transaction. the truth table
    should match the type of stock transaction being recorded.



Summary of changes:
 .../report/reports/standard/ifrs-cost-basis.scm    | 240 ++++++++++++++++-----
 .../reports/standard/test/test-ifrs-cost-basis.scm |  12 +-
 2 files changed, 197 insertions(+), 55 deletions(-)