--from does not accept pattern starting with #

```
$ repren --from '#include ' --to '#include ' .
error: found no parse patterns
```

Same with `--literal`:

```
$ repren --literal --from '#include ' --to '#include ' .
error: found no parse patterns
```
##

This is because it interprets the `#` as a comment character (in function `parse_patterns()`).

It would be nice if this comment logic did not apply when patterns are supplied directly via `--from` `--to`, and/or when `--literal` is given.