Error sampling for bar/assertion failures — 309/941

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/playwright/hs-behavioral.spec.js

@@ -280,7 +280,7 @@ test.describe('Hyperscript behavioral tests', () => {
       console.log(`    [${info.count}x] ${e}`);
     }
     // Show samples of "bar" error specifically
-    const barSamples = results.filter(r => !r.p && (r.e||'').endsWith('bar') || (r.e||'').endsWith('bar ')).slice(0, 8);
+    const barSamples = results.filter(r => !r.p && (r.e||'').match(/exception:  \w+ *$/)).slice(0, 10);
     if (barSamples.length > 0) {
       console.log(`  "bar" error samples (${barSamples.length}):`);
       for (const s of barSamples) console.log(`    ${s.s}/${s.n}`);