Does not trim dos newlines correctly.

If the tailed file has dos line endings, they are not trimmed properly.

Given the following input file:
```
line number 1
line number 2
```

If the file has dos line endings the `"%q\n"` formatted lines are:
```
"line number 1\r"
"line number 2\r"
```

I am expecting the same lines as if it had unix line endings:
```
"line number 1"
"line number 2"
```