codespell ignores C/C++ tabs ('\t') in strings

I found out, that codespell gives wrong answers in case of a tab is used within a C/C++ string. For example:
test.c:

``` c++
int main()
{
    std::cout<< "\tTest\n";
}
```

dict.txt:

```
ttest->test
```

Scanning with test.c with codespell gives a wrong result:

```
$ ../codespell.py dict.txt test.c 
test.c:3: tTest  ==> test
```
