gnucash-docs maint: Emphasise methods & fix a few typos in guide currency (de, en)

[Frank H.Ellenberger]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/e14445d8 (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/bae91941 (commit)



commit e14445d8d6606b7f302d88f78dd94ada48322569
Author: fell <frank.h.ellenberger at gmail.com>
Date:   Sat Mar 17 07:00:57 2018 +0100

    Emphasise methods & fix a few typos in guide currency (de, en)



Summary of changes:
 guide/C/ch_currency.xml  |  4 ++--
 guide/de/ch_currency.xml | 14 +++++++-------
 2 files changed, 9 insertions(+), 9 deletions(-)