Fix support for characters `–` and `—`

Statements containing `–` and `—` fail to parse.

Example:
```
The E(review process), which { M(may) F(include) P,p(existing) P(committees [OR] panels), [AND] is F(deemed to satisfy) the P(requirements of the guidelines issued pursuant to section 515 of the Treasury and General Government Appropriations Act for Fiscal year 2001 (Public Law 106–554—Appendix C; 114 Stat. 2763A–153))}.
```