def fix_extensions(dummies, chunker):
ext = '<STR_LIT>' if chunker['<STR_LIT>'].lower() == '<STR_LIT>' else '<STR_LIT>'<EOL>for k in dummies.keys():<EOL><INDENT>new_k = '<STR_LIT:.>'.join([k, ext, '<STR_LIT>'])<EOL>dummies[new_k] = dummies.pop(k)<EOL><DEDENT>
now that to_s3_chunks uses the file extension to detect the
    compression and type, this test has to make real filenames with
    proper extesions.