Fix off-by-one errors in HunkMatcher diff remap tests

Two tests passed the wrong oldLine value (off by +1), causing
the remapped result to be 1 higher than expected:
- parseDiffAndRemap with multiple hunks: 6→5
- parseDiffAndRemap with single line hunk: 7→6

Also remove diagnostic CI step no longer needed.

https://claude.ai/code/session_015LpmjAt17XD582hZ9TPLCv

Author: claude

.github/workflows/ci.yml

@@ -45,20 +45,6 @@ jobs:
       - name: Run tests
         run: ./gradlew test --stacktrace
 
-      - name: Print test results on failure
-        if: failure()
-        run: |
-          echo "=== TEST RESULTS XML ==="
-          find build/test-results -name '*.xml' -exec cat {} \; 2>/dev/null || echo "No XML results found"
-          echo "=== STDOUT/STDERR ==="
-          find build/test-results -name '*.txt' -exec cat {} \; 2>/dev/null || echo "No text output found"
-          echo "=== GRADLE TEST REPORT ==="
-          find build/reports/tests -name '*.html' -exec grep -l 'failures' {} \; 2>/dev/null || echo "No HTML reports found"
-          for f in $(find build/reports/tests -name '*.html' 2>/dev/null); do
-            echo "--- $f ---"
-            cat "$f" | sed 's/<[^>]*>//g' | head -100
-          done
-
       - name: Upload test results
         if: always()
         uses: actions/upload-artifact@v4

review-plugin/src/test/kotlin/com/reviewplugin/anchor/HunkMatcherTest.kt

@@ -159,7 +159,7 @@ class HunkMatcherTest {
         """.trimIndent()
         // After first hunk: offset = (2+3)-(2+2) = 1
         // Old line 5 is between hunks → 5 - 1 + 1 = 5 (0-based)
-        assertEquals(5, HunkMatcher.parseDiffAndRemap(diff, 6))
+        assertEquals(5, HunkMatcher.parseDiffAndRemap(diff, 5))
     }
 
     @Test
@@ -174,7 +174,7 @@ class HunkMatcherTest {
         // Old line 5 is in the hunk (5..5)
         assertNull(HunkMatcher.parseDiffAndRemap(diff, 5))
         // Old line 6 is after: offset = (5+2)-(5+1) = 1, result = 6-1+1 = 6
-        assertEquals(6, HunkMatcher.parseDiffAndRemap(diff, 7))
+        assertEquals(6, HunkMatcher.parseDiffAndRemap(diff, 6))
     }
 
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