`blasttab+` export impossible due to incorrect regular expression.

### Description of the bug

```
* --export_aln_to (blasttab+): "blasttab+" does not match regular expression [^((no_export|axt|bam|bcf|bed|blast|blasttab|blasttab+|chain|cram|gff|html|psl|sam|tab)?,?)*(?<!,)$]
```

### Command used and terminal output

```console

```

### Relevant files

_No response_

### System information

_No response_