updating the logic of debug-info output format

Author: joseph-flinn

tmuxp/cli.py

@@ -1085,10 +1085,10 @@ def format_tmux_resp(std_resp):
         """
         Format tmux command response for tmuxp stdout.
         """
-        return [
+        return '\n'.join([
             '\n'.join(prepend_tab(std_resp.stdout)),
             click.style('\n'.join(prepend_tab(std_resp.stderr)), fg='red'),
-        ]
+        ])
 
     output = [
         output_break(),