launch_test no newline after test name

[benjinne]

Bug report

Required Info:

• Operating System:
  • Ubuntu 22.04
• Installation type:
  • source
• Version or commit hash:
  • humble
• DDS implementation:
  • default
• Client library (if applicable):
  • rclpy

Steps to reproduce issue

/opt/ros/humble/launch_test share/launch_testing/examples/good_proc_launch_test.py

Expected behavior

Print each test name on it's own line

test_count_to_four (good_proc_launch_test.TestGoodProcess) ... 
[INFO] [python3-1]: process started with pid [451737]

Actual behavior

test_count_to_four (good_proc_launch_test.TestGoodProcess) ... [INFO] [python3-1]: process started with pid [451737]