def build_ufo_path(out_dir, family_name, style_name):
return os.path.join(<EOL>out_dir,<EOL>"<STR_LIT>"<EOL>% ((family_name or "<STR_LIT>").replace("<STR_LIT:U+0020>", "<STR_LIT>"), (style_name or "<STR_LIT>").replace("<STR_LIT:U+0020>", "<STR_LIT>")),<EOL>)<EOL>
Build string to use as a UFO path.