Code review cleanup and formatting

- Extract duplicate fragment context handling to tokenizerOpts() helper
- Remove unused SELECT_SCOPE_ELEMENTS constant
- Update HTMLStream documentation to accurately describe behavior
- Fix compare.py benchmark script (correct product capitalization)
- Apply swift-format across codebase
- Add code review notes documenting findings

No performance regression - all tests pass.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: kylehowells

Benchmarks/BENCHMARK_RESULTS.md

@@ -1,12 +1,12 @@
 # Cross-Implementation Benchmark Results
 
-**Generated:** 2025-12-17 18:39:43
+**Generated:** 2025-12-18 08:25:27
 
 ## Repository Versions
 
 | Project | Branch | Commit | Date |
 |---------|--------|--------|------|
-| swift-justhtml | turbo | `76fee4992b72` | 2025-12-17 |
+| swift-justhtml | master | `0d8b61ecd58e` | 2025-12-18 |
 | justhtml (Python) | main | `63c29b26be64` | 2025-12-16 |
 | justjshtml (JavaScript) | main | `e29dbd3166e9` | 2025-12-16 |
 
@@ -17,6 +17,7 @@ All implementations produce **identical output** for all test files.
 | File | Status |
 |------|--------|
 | hackernews.html | ✅ OK |
+| synthetic.html | ✅ OK |
 | wikipedia_countries.html | ✅ OK |
 | wikipedia_html.html | ✅ OK |
 | wikipedia_swift.html | ✅ OK |
@@ -26,29 +27,31 @@ All implementations produce **identical output** for all test files.
 
 | File | Size | Swift | Python | JavaScript | Swift vs Python | Swift vs JS |
 |------|------|-------|--------|------------|-----------------|-------------|
-| hackernews.html | 34 KB | 2.09 ms | 7.65 ms | 1.59 ms | 3.67x faster | 1.31x slower |
-| wikipedia_countries.html | 360 KB | 14.61 ms | 62.27 ms | 14.60 ms | 4.26x faster | 1.00x slower |
-| wikipedia_html.html | 472 KB | 18.81 ms | 79.89 ms | 19.65 ms | 4.25x faster | 1.04x faster |
-| wikipedia_swift.html | 411 KB | 16.96 ms | 67.02 ms | 16.96 ms | 3.95x faster | 1.00x faster |
-| wikipedia_ww2.html | 1204 KB | 44.02 ms | 181.64 ms | 46.39 ms | 4.13x faster | 1.05x faster |
-| **TOTAL** | | **96 ms** | **398 ms** | **99 ms** | **4.13x faster** | **1.03x faster** |
+| hackernews.html | 34 KB | 2.12 ms | 7.79 ms | 1.71 ms | 3.68x faster | 1.24x slower |
+| synthetic.html | 20498 KB | 1221.96 ms | 3595.00 ms | 933.79 ms | 2.94x faster | 1.31x slower |
+| wikipedia_countries.html | 360 KB | 14.27 ms | 90.08 ms | 14.99 ms | 6.31x faster | 1.05x faster |
+| wikipedia_html.html | 472 KB | 18.89 ms | 104.40 ms | 20.56 ms | 5.53x faster | 1.09x faster |
+| wikipedia_swift.html | 411 KB | 16.98 ms | 132.85 ms | 16.54 ms | 7.82x faster | 1.03x slower |
+| wikipedia_ww2.html | 1204 KB | 44.00 ms | 238.61 ms | 47.92 ms | 5.42x faster | 1.09x faster |
+| **TOTAL** | | **1318 ms** | **4169 ms** | **1036 ms** | **3.16x faster** | **1.27x slower** |
 
 ## Summary
 
-- **Swift** total parse time: 96 ms
-- **Python** total parse time: 398 ms
-- **JavaScript** total parse time: 99 ms
+- **Swift** total parse time: 1318 ms
+- **Python** total parse time: 4169 ms
+- **JavaScript** total parse time: 1036 ms
 
-**Swift** is the fastest implementation.
+**JavaScript** is the fastest implementation (V8 JIT optimization).
 
-Swift is **4.1x faster** than Python.
-JavaScript is **1.0x faster** than Swift.
+Swift is **3.2x faster** than Python.
+JavaScript is **1.3x faster** than Swift.
 
 ## Test Files
 
 | File | Source | Size |
 |------|--------|------|
 | hackernews.html | Hacker News | 34,478 bytes |
+| synthetic.html | Generated (stress test) | 20,990,426 bytes |
 | wikipedia_countries.html | Wikipedia | 369,101 bytes |
 | wikipedia_html.html | Wikipedia | 483,786 bytes |
 | wikipedia_swift.html | Wikipedia | 420,395 bytes |

Benchmarks/compare.py

@@ -83,7 +83,7 @@ def run_swift_benchmark():
 
     # Build release version
     result = subprocess.run(
-        ["swift", "build", "-c", "release", "--product", "benchmark"],
+        ["swift", "build", "-c", "release", "--product", "Benchmark"],
         cwd=SWIFT_PROJECT_ROOT,
         capture_output=True,
         text=True
@@ -94,7 +94,7 @@ def run_swift_benchmark():
 
     # Run benchmark
     result = subprocess.run(
-        ["swift", "run", "-c", "release", "benchmark"],
+        ["swift", "run", "-c", "release", "Benchmark"],
         cwd=SWIFT_PROJECT_ROOT,
         capture_output=True,
         text=True