treatment of quotes

This works (correctly flags `asdf` as not in the dictionary):
```r
hunspell::hunspell(text = c("' asdf"), format = "latex")
```
however these do not; it seems like anything after the quotes is disregarded?
```r
hunspell::hunspell(text = c("'' asdf"), format = "latex")
hunspell::hunspell(text = c("''", "asdf"), format = "latex")
```
Thank you for considering.
