Doc changes only to test/functional/rpc_fundrawtransaction.py:
- remove ascii art or convert to a docstring when sufficiently different from the logging
- touch up other comments while here
This is a backport of Core PR17327 [2/2]
https://github.com/bitcoin/bitcoin/pull/17327/commits/ff22751417c6fbbd22f4eefd0e23431a83335c13
Depends on D8234