Fix newline in multiline plugin output display

[hakong]

Actual behavior:
After the first line in any multiline output, an additional newline is displayed in the output.

Expected behavior:
Multiline output is displayed as-is, correctly.

Screenshot of Adagios displaying multi-line output:

Actual plugin output:

[gardart]

thanks @hakong
I will take a look at this plugin

[hakong]

It's not bound to this plugin specifically, its all multi-line output from any plugins.