gnucash-docs maint: Add warning and tip about account separator character

[Frank H. Ellenberger]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/c16b6743 (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/0b429cbb (commit)



commit c16b67439ce944631b58ae5c8283e35f61659067
Author: Frank H. Ellenberger <frank.h.ellenberger at gmail.com>
Date:   Thu Sep 25 20:49:13 2014 +0200

    Add warning and tip about account separator character



Summary of changes:
 guide/C/ch_txns.xml | 30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)