Non-standard symbols in path

Reproducible example (on *nix/MacOS):
```
mkdir test_dir
touch test_dir/good_file.txt
touch test_dir/bad_\\trash.txt
th
th> for f in paths.iterfiles('./test_dir') do
..> print(f)
..> end
```
Output: `good_file.txt` only.

`ls` works correctly:
```
ls test_dir
> bad_\trash.txt good_file.txt
```