SyntaxWarning: invalid escape sequence in ylabel in plot_campaign.py

Running plot_campaign.py produces a warning: SyntaxWarning: invalid escape sequence '\m' ax.set_ylabel('c_\mathrm{INP} / l_\mathrm{std}^{-1}') Python interprets \m in \mathrm as an invalid escape sequence. This does not crash the code but triggers a warning. Suggested fix: Use a raw string to prevent Python from interpreting backslashes: ax.set_ylabel(r'c_\mathrm{INP} / l_\mathrm{std}^{-1}') This resolves the warning while keeping the LaTeX formatting intact.