Use utf-8 encoding when reading dose coefficient files (thanks Fabricio Gatti)

openmc/data/effective_dose/dose.py

@@ -23,7 +23,7 @@ def _load_dose_icrp116():
     """Load effective dose tables from text files"""
     for particle, filename in _FILES:
         path = Path(__file__).parent / filename
-        data = np.loadtxt(path, skiprows=3)
+        data = np.loadtxt(path, skiprows=3, encoding='utf-8')
         data[:, 0] *= 1e6   # Change energies to eV
         _DOSE_ICRP116[particle] = data