Bug report

Required Info:

• Operating System:
  • Windows Server 2019 Datacenter (akin to Windows 10)
• Installation type:
  • From binaries.
• Version or commit hash:
  • Dashing pre-release

Steps to reproduce issue

Run any launch file, e.g. the in lifecycle demos:

ros2 launch lifecycle lifecycle_demo.launch.py

Expected behavior

Processes output is logged appropriately, line by line.

Actual behavior

Processes output is logged with additional splits, not only at newlines, e.g.:

[lifecycle_talker.EXE-1] [
[lifecycle_talker.EXE-1] INFO] [lc_talker]: Lifecycle publisher is currently inactive. Messages are not published.
[lifecycle_talker.EXE-1] [
[lifecycle_talker.EXE-1] WARN] [LifecyclePublisher]: Trying to publish message on the topic '/lifecycle_chatter', but the publisher is not activated

Additional information

Most likely, this is just launch.actions.ExecuteProcess implementation assuming that each launch.events.ProcessIO event comes with an integer count of lines, see here.