gnucash-docs maint: Minor doc spelling and grammar

[Geert Janssens]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/45523a15 (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/72a1778c (commit)



commit 45523a157c5578c87000d65d7727d7970ec81a7f
Author: Phil Davis <phil.davis at inf.org>
Date:   Mon Mar 27 13:39:18 2017 +0545

    Minor doc spelling and grammar



Summary of changes:
 guide/C/ch_bus_features.xml | 10 +++++-----
 guide/C/ch_invest.xml       | 19 +++++++++----------
 2 files changed, 14 insertions(+), 15 deletions(-)