fix: add word boundary to RAW_STR regexes to prevent false matches

[corvid-agent]

Summary

• Adds \b word boundary anchor before r in all four RAW_STR_* regex patterns (RAW_STR_0 through RAW_STR_3) in src/exports/rust_lang.rs
• Prevents identifiers ending in r adjacent to " (e.g. "pre_pr") from being misinterpreted as raw string literal starts, which could span many lines and swallow pub declarations
• Adds regression test reproducing the exact scenario from the issue

Test plan

• All 15 rust_lang tests pass (including new regression test)
• Existing raw string stripping still works correctly (tested via test_ignores_pub_inside_string_literals and test_pub_after_raw_string_with_hash_in_content)
• Real file tests (test_real_ai_rs, test_real_registry_rs) still pass

Fixes #261

🤖 Generated with Claude Code

[github-actions]

❌ Corvin says...

      _
    <(;\  .oO(oh no...)
     |/(\
      \(\\
      " "\\

"I'm pecking through the errors..."

CI Summary

Check	Status
Validate action.yml	✅ Passed
Dependency Audit	✅ Passed
Code Coverage	✅ Passed
Format Check	❌ failure
Spec Validation	✅ Passed
Tests (build, test, clippy)	✅ Passed

📋 Spec Validation Details

✅ SpecSync: Passed

Metric	Value
Specs checked	57
Passed	57
Errors	0
Warnings	0
File coverage	97% (73/75)
LOC coverage	98% (32594/32954)

Unspecced Files

The following source files have no spec coverage:

• src/exports/ast/tests.rs
• src/util.rs

Run specsync generate to scaffold specs for these files.

---

Generated by specsync · Run specsync check --format github to reproduce

---

_{Powered by corvid-pet}

[corvid-agent]

👋 CorvidAgent is looking into this.

[corvid-agent]

Fixed in e871b69 — ran rustfmt to collapse RAW_STR_1 and RAW_STR_0 to single lines. Format check should pass now.

Superseded by updated review.

[github-actions]

✅ Corvin says...

      _
    <(^\  .oO(Caw! ^v^)
     |/(\
      \(\\
      " "\\

"Caw! Found a shiny new spec!"

CI Summary

Check	Status
Validate action.yml	✅ Passed
Dependency Audit	✅ Passed
Code Coverage	✅ Passed
Format Check	✅ Passed
Spec Validation	✅ Passed
Tests (build, test, clippy)	✅ Passed

📋 Spec Validation Details

✅ SpecSync: Passed

Metric	Value
Specs checked	57
Passed	57
Errors	0
Warnings	0
File coverage	97% (73/75)
LOC coverage	98% (32592/32952)

Unspecced Files

The following source files have no spec coverage:

• src/exports/ast/tests.rs
• src/util.rs

Run specsync generate to scaffold specs for these files.

---

Generated by specsync · Run specsync check --format github to reproduce

---

_{Powered by corvid-pet}

[corvid-agent]

👋 CorvidAgent is looking into this.

[corvid-agent]

All green — format issue was already fixed in e871b69. CI is passing across the board. Ready to merge.

[corvid-agent]

👋 CorvidAgent is looking into this.

[corvid-agent]

👋 CorvidAgent is looking into this.

[corvid-agent]

👋 CorvidAgent is looking into this.

[corvid-agent]

Thanks for the review, Leif! Merging now.

[corvid-agent]

Thanks for the review and approval, @0xLeif! This one's already merged. 🤝