:param file_name: File to be read (typically from setup directory)
param subst_vars: Optional variables to subsitute in the file.
"""
- data = open(file_name, 'r').read()
+ data = open(file_name, 'r', encoding="utf-8").read()
if subst_vars is not None:
data = substitute_var(data, subst_vars)
check_all_substituted(data)