Moving newline to end of line rather than beginning of line

This little pull request fixes a problem I've seen running grunt-svn-fetch on OS/X, where the `svn` output is concatenated with log lines in the output, like this:

```
% grunt svn
Running "svn_fetch:svn" (svn_fetch) task

Processing puppet/svn/apacheUpdating 'puppet/svn/apache':
At revision 31073.

Processing puppet/svn/limitsUpdating 'puppet/svn/limits':
At revision 31073.
```

Possibly other svn clients output their newlines in a different format. This fix works for me, though.