fix(debug): Show literals in the traces

[epage]

[epage]

@baoyachi you seemed interested in improving the traces. Any thoughts on this?

[codecov[bot]]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (967504e) 42.73% compared to head (c1e8905) 42.69%.

Files	Patch %	Lines
src/combinator/debug/mod.rs	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #469 +/- ## ========================================== - Coverage 42.73% 42.69% -0.05% ========================================== Files 18 18 Lines 3089 3092 +3 ========================================== Hits 1320 1320 - Misses 1769 1772 +3 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.

[coveralls]

Pull Request Test Coverage Report for Build 7859443517

• -2 of 3 (33.33%) changed or added relevant lines in 2 files are covered.
• 3 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.04%) to 42.691%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/combinator/debug/mod.rs	0	2	0.0%
<!--	Total:	1	3	33.33%	-->

Files with Coverage Reduction	New Missed Lines	%
src/token/mod.rs	1	75.66%
src/ascii/mod.rs	2	55.28%
<!--	Total:	3		-->

Totals
Change from base Build 7859434341:	-0.04%
Covered Lines:	1320
Relevant Lines:	3092

---

💛 - Coveralls