gnucash-docs master: Fix docbook validity errors.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/b1f010e8 (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/a2e8bfa4 (commit)



commit b1f010e8b99218033a0cfef95f0e7b582bd53dd8
Author: John Ralls <jralls at ceridwen.us>
Date:   Thu Jun 25 10:11:57 2020 -0700

    Fix docbook validity errors.



Summary of changes:
 guide/C/ch_basics.xml           | 12 ++++++------
 guide/C/ch_txns.xml             |  4 ++--
 help/C/Help_ch_Transactions.xml |  2 +-
 3 files changed, 9 insertions(+), 9 deletions(-)