Fix offset of new hunk

Author: cruessler

gix-blame/tests/blame.rs

@@ -348,7 +348,7 @@ fn process_change(
                     ));
 
                     let new_hunk = if hunk.range_in_destination.end > unchanged.end {
-                        Some(UnblamedHunk::new(
+                        Some(UnblamedHunk::from_destination(
                             unchanged.end..hunk.range_in_destination.end,
                             hunk.offset(),
                         ))
@@ -1315,6 +1315,44 @@ fn process_change_works_unchanged_hunk_2() {
     assert_eq!(offset_in_destination, Offset::Added(0));
 }
 
+#[test]
+fn process_change_works_unchanged_hunk_3() {
+    let mut lines_blamed: Vec<BlameEntry> = vec![];
+    let mut new_hunks_to_blame: Vec<UnblamedHunk> = vec![];
+    let mut offset_in_destination: Offset = Offset::Deleted(2);
+    let suspect = ObjectId::null(gix_hash::Kind::Sha1);
+
+    let (hunk, change) = process_change(
+        &mut lines_blamed,
+        &mut new_hunks_to_blame,
+        &mut offset_in_destination,
+        suspect,
+        Some(UnblamedHunk {
+            range_in_blamed_file: 22..30,
+            range_in_destination: 21..29,
+        }),
+        Some(Change::Unchanged(21..23)),
+    );
+
+    assert_eq!(
+        hunk,
+        Some(UnblamedHunk {
+            range_in_blamed_file: 24..30,
+            range_in_destination: 23..29
+        })
+    );
+    assert_eq!(change, None);
+    assert_eq!(lines_blamed, vec![]);
+    assert_eq!(
+        new_hunks_to_blame,
+        vec![UnblamedHunk {
+            range_in_blamed_file: 22..24,
+            range_in_destination: 23..25
+        }]
+    );
+    assert_eq!(offset_in_destination, Offset::Deleted(2));
+}
+
 #[test]
 fn process_change_works_deleted_hunk() {
     let mut lines_blamed: Vec<BlameEntry> = vec![];