configure_file: Compare difference in binary mode
Otherwise Python will try to use string decode on the configured file
and fail if it contains characters that can't be mapped to the current
encoding.
@@ -534,7 +534,7 @@ def replace_if_different(dst, dst_tmp):
# unnecessary rebuilds.
different = True
try:
- with open(dst, 'r') as f1, open(dst_tmp, 'r') as f2:
+ with open(dst, 'rb') as f1, open(dst_tmp, 'rb') as f2:
if f1.read() == f2.read():
different = False
except FileNotFoundError:
