Replace usage of os.devnull with subprocess.DEVNULL (#13932)...
Replace usage of os.devnull with subprocess.DEVNULL (#13932)
Refactoring one file in the latex library
Closes
https://github.com/ipython/ipython/issues/13906
# Code changes
Replaced one occurence of `open(os.devnull)` with using directly the
`subprocess.DEVNULL` special value, removing a with/open block along the
way.
# User-facing changes
None
