gnucash maint: Fix a few typos in python example scripts and align them with the latest api changes

[Geert Janssens]

Updated	 via  https://github.com/Gnucash/gnucash/commit/e59c3e06 (commit)
	from  https://github.com/Gnucash/gnucash/commit/22490a37 (commit)



commit e59c3e0639470bcdca39970ef8f7ff00849ec4e0
Author: Geert Janssens <janssens-geert at telenet.be>
Date:   Mon Nov 17 17:45:40 2014 +0100

    Fix a few typos in python example scripts and align them with the latest api changes



Summary of changes:
 .../example_scripts/simple_business_create.py             |  4 ++--
 .../example_scripts/simple_invoice_insert.py              | 15 +++++++--------
 2 files changed, 9 insertions(+), 10 deletions(-)