Finish removing ASCII art from sw/source/core/text

Change-Id: If845234120236f35edb57c767b5debc046e85864
Reviewed-on: https://gerrit.libreoffice.org/9101
Reviewed-by: Chris Sherlock <chris.sherlock79@gmail.com>
Tested-by: Chris Sherlock <chris.sherlock79@gmail.com>