I think a better solution would be to use code fences for your code, configs, and logs.
```
code goes here
```
That will keep your indentations, avoid premature line wraps, and put everything in a nice little box with scroll bars that makes it SOOOO much easier to read.
I’d rather see more information properly formatted than have you redact information when you don’t really know what is or is not relevant yet.
Not in relation to MQTT.
What version of OH are you upgrading from?
If OH 1.8 (or before) are you following the Migration Tutorial?
MQTT works largely the same but just in case: