gnucash maint: [qif/qif-parse] restore handle non-4-digit dates, and erratum

[Christopher Lam]

Updated	 via  https://github.com/Gnucash/gnucash/commit/6252de21 (commit)
	from  https://github.com/Gnucash/gnucash/commit/08de1a0a (commit)



commit 6252de21fd2c02b2a45b72f0ca63259ef2365236
Author: Christopher Lam <christopher.lck at gmail.com>
Date:   Mon Aug 5 07:37:16 2019 +0800

    [qif/qif-parse] restore handle non-4-digit dates, and erratum
    
    db93aec58 contained logic error in date-handling, would invalidate
    2-digit years.
    
    Also parse-bang-field needs to trim trailing space.



Summary of changes:
 gnucash/import-export/qif-imp/qif-parse.scm           | 6 +++---
 gnucash/import-export/qif-imp/test/test-qif-parse.scm | 6 ++++++
 2 files changed, 9 insertions(+), 3 deletions(-)