gnucash-docs maint: Multiple changes pushed

[Frank H.Ellenberger]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/5a091906 (commit)
	 via  https://github.com/Gnucash/gnucash-docs/commit/de98af34 (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/b8f3cde3 (commit)



commit 5a0919068b8b2af8dd9c654463d2d2fd987a604f
Author: Frank H. Ellenberger <frank.h.ellenberger at gmail.com>
Date:   Sat Apr 18 14:37:13 2020 +0200

    L10N:de: Hilfe: Aktualisiere Yahoo-Kürzel für Börsen und Märkte

commit de98af343a4bf955aa6fb923859c202fe053fc98
Author: Frank H. Ellenberger <frank.h.ellenberger at gmail.com>
Date:   Tue Apr 14 23:32:48 2020 +0200

    Help: "Update Yahoo Codes for Exchanges and Markets"



Summary of changes:
 help/C/Help_tips-appendix.xml  | 749 +++++++++++++++++++++++++++--------------
 help/de/Help_tips-appendix.xml | 396 +++++++++++++++++-----
 2 files changed, 810 insertions(+), 335 deletions(-)