Cleaning of the joint line

[ayessa]

There is a string formed from many strings using Concatenate Strings. At the output we have a large multi-line text, you need to clear this line
In the attachments, I showed how I tried to clean the string, but it does not bring results ..

[altenbach]

It is not helpful to attach a truncated code image containing wire branches, no terminals, and a property node missing the label.

Is this a control or indicator? What else is writing to it? Please attach the entire VI. What is the code architecture?