You can take notes about the other styling comments and apply them next time, but for this one... please cut down this line! :-)

```
parser = argparse.ArgumentParser("This script plots the complexity curves generated for one " \
                                 "or several libraries. The script is designed to work using the " \
                                 "output produced by preseq (http://smithlabresearch.org/software/preseq/). " \ 
etc.                                                    ....
```

Tack!