Description of the problem

When using mne.utils.run_subprocess(), each line printed to stdout by the subprocess will be printed with an additional empty line immediately after.

Steps to reproduce

# subp.py
print('foo')
print('bar')

# main.py
from mne.utils import run_subprocess

run_subprocess(command=['python', 'subp.py'])

Run via:

python main.py

Expected results

foo
bar

Actual results

foo

bar

Additional information

This is with main