The new behavior is that now we don't insert a line (with insert_lines) if a variables value is an empty string =""= it is not inserted.
So lets say we want to make sure a file has a couple of lines. The file is a KEY VALUE space separated format. But its acceptable for VALUE to not exist.
We would represent this in a classic array like this:
And we would use set_config_values or set_line_based from the stdlib to edit the file.
Now instead of getting the expected results:
We get the following: