DiffEditor: Fix git diff parsing for rename + mode change

Sample output:
diff --git a/projects/cosign/build.sh b/projects/argo/build.sh
old mode 100755
new mode 100644
similarity index 88%
rename from projects/cosign/build.sh
rename to projects/argo/build.sh
index 87d865d2..14b8885c
--- a/projects/cosign/build.sh
+++ b/projects/argo/build.sh
@@ -13,7 +13,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
 ################################################################################

+$SRC/cncf-fuzzing/projects/argo/build.sh
+

-compile_go_fuzzer github.com/sigstore/cosign/test FuzzGetPassword fuzz_getPassword gofuzz

Change-Id: Ifa66dfdb80b309d72f524f15c681823ab7e133ba
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>

src/plugins/diffeditor/diffeditorplugin.cpp

@@ -1341,6 +1341,26 @@ void DiffEditor::Internal::DiffEditorPlugin::testReadPatch_data()
 
     QTest::newRow("Mode change") << patch << fileDataList9;
 
+    //////////////
+    patch = R"(diff --git a/old.sh b/new.sh
+old mode 100644
+new mode 100755
+similarity index 100%
+rename from old.sh
+rename to new.sh
+)"
+            ;
+
+    fileData1 = FileData();
+    fileData1.leftFileInfo = DiffFileInfo("old.sh");
+    fileData1.rightFileInfo = DiffFileInfo("new.sh");
+    fileData1.fileOperation = FileData::RenameFile;
+
+    QList<FileData> fileDataList10;
+    fileDataList10 << fileData1;
+
+    QTest::newRow("Mode change + rename") << patch << fileDataList10;
+
     //////////////
 
     // Subversion New