Upgrade jgit to 6.9.0.202403050737-r

Fixes ASSERT-KTH#487.

pom.xml

@@ -74,7 +74,7 @@
         <dependency>
             <groupId>org.eclipse.jgit</groupId>
             <artifactId>org.eclipse.jgit</artifactId>
-            <version>6.3.0.202209071007-r</version>
+            <version>6.9.0.202403050737-r</version>
         </dependency>
         <dependency>
             <groupId>org.jetbrains.kotlin</groupId>

src/main/kotlin/se/kth/spork/util/LineBasedMerge.kt

@@ -63,6 +63,9 @@ fun lineBasedMerge(base: String, left: String, right: String): Pair<String, Int>
                 inConflict = true
             }
             lines.add(SporkPrettyPrinter.MID_CONFLICT)
+        } else if (chunk.conflictState
+            == MergeChunk.ConflictState.BASE_CONFLICTING_RANGE) {
+            continue;
         }
         for (i in chunk.begin until chunk.end) {
             lines.add(seq.getString(i))

src/test/java/se/kth/spork/LineBasedMergeTest.java

@@ -0,0 +1,27 @@
+package se.kth.spork;
+
+import kotlin.Pair;
+import org.junit.jupiter.api.Test;
+import se.kth.spork.util.LineBasedMergeKt;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class LineBasedMergeTest {
+
+    @Test
+    public void testMergeWithDeletionsMinimal() {
+        Pair<String, Integer> result = LineBasedMergeKt.lineBasedMerge(
+                "a\nB\nC\nD\ne",
+                "a\nB\nC\ne",
+                "a\nB\nD\ne");
+
+        assertEquals("a\n" +
+                "B\n" +
+                "<<<<<<< LEFT\n" +
+                "C\n" +
+                "=======\n" +
+                "D\n" +
+                ">>>>>>> RIGHT\n" +
+                "e", result.component1());
+    }
+}