pseudos: Compare against "text" instead of accessing el.type again

* Use "text" instead of `el.type`, should perform slightly better   as it doesn't access the DOM and seems to also gzip slightly better (though that can vary over time with context).

* Added missing space (unbalanced).

----

```
   raw     gz Compared to master @ 5efc23fa10f25020f95d31b3041114b3bd44ee53    
    -3      = dist/sizzle.js                                                   
     =     -1 dist/sizzle.min.js        
```