gnucash maint: Multiple changes pushed

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/ff298b36 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/88644451 (commit)
	 via  https://github.com/Gnucash/gnucash/commit/119fdc36 (commit)
	from  https://github.com/Gnucash/gnucash/commit/0973d54d (commit)



commit ff298b365f83346e68638abf530d022e8367c459
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Tue Nov 26 18:18:14 2019 +0800

    [test-balsheet-pnl] add multicol-balsheet and multicol-pnl tests
    
    This commit adds tests for multicolumn balance-sheet and
    income-statement. It mainly tests:
    
    * multiple periods
    * unrealized gains calculators
    * amounts/balances are predictable

commit 88644451ef29089c139a3ca643d3e5fbda04f4b6
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Tue Nov 26 18:11:15 2019 +0800

    [test-balsheet-pnl] separate balance-sheet and pnl tests
    
    This is in preparation for balsheet-pnl tests. Note all tests use same
    data -- there's no (teardown).

commit 119fdc368b41d0a1207e9d281deddcfe08e52d59
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Mon Nov 25 22:52:36 2019 +0800

    [report-utilities] can strify records
    
    srfi-9 records can contain complex objects eg lists/vectors also
    gnc:monetary or gnc:html-table objects. previously gnc:strify would
    use the default printer; this commit modifies so that they are
    prettified.
    
    example output; a :col-datum record from balsheet-pnl. the record's
    split-balance contains a $0 monetary object.
    
    Rec::col-datum{last-split=#f, split-balance=[$0.00]}
    
    this last pretty-printer must be the last one before object->string,
    because we want previous printers which may be records too
    eg. monetary->str etc to use their own printer.



Summary of changes:
 gnucash/report/report-system/report-utilities.scm  |   7 +
 .../standard-reports/test/test-balsheet-pnl.scm    | 731 ++++++++++++---------
 2 files changed, 430 insertions(+), 308 deletions(-)