[Bug]: Invalid escape sequence in toolbox.py

Description

When running dtsbutler commands at ICEBERG, we get these invalid escape sequence warnings:

/exp/pdune/daq/dunecet/fddaq-v5.6.0-develop/install/timing/lib64/python/timing/cli/toolbox.py:107: SyntaxWarning: invalid escape sequence '\w'
  if re.match('^\w+://.*', c) is None:

Right now, the warnings are just annoying. However, starting in Python 3.12, this becomes a syntax error. DUNE DAQ will likely upgrade our Python version at some point, so this should be fixed before then.

The solution is to use raw strings by adding r before the matching string:

if re.match(r'^\w+://.*', c) is None:

I'll submit a PR for this by CoB today.

Steps to reproduce

Build or setup a recent DUNE DAQ area, e.g., fddaq-v5.6.0 onward, on a node with access to a valid device. Run dtsbutler io <device> reset and observe the warning.

Version and environment

I'm running dtsbutler commands on iceberg03.fnal.gov using the device BOREAS_TLU_ICEBERG. I have a local build of fddaq-v5.6.0 with timing v7.14.0 checked out, though the problem line is unchanged in any recent version, including develop.

Impact

Small/Isolated

Anything else?

No response

Open timing/cli/toolbox.py around line 107 and inspect the regular-expression string used by dtsbutler. Run dtsbutler io <device> reset in a recent DUNE DAQ setup and confirm the invalid escape warning no longer appears.