Optimize `python3 test_reform.py` output

The output of `python3 test_reform.py` is not clean or clear. It produced 937 lines of output without summary.

A `grep -b2 -i` of the output for error and fail came back with two instances of this
```
File "../../reform.py", line 252, in index_fasta
    with gzip_module.open(fasta_path, 'rt', thread=None) as f:
TypeError: open() got an unexpected keyword argument 'thread'
```

