Add test for a pick that fails and gets rescheduled

This test is interesting because it already behaves as desired: since git has
rescheduled the "pick" command, we do _not_ want to show a "conflict" entry in
this case, as we would see the same commit twice then.

pkg/integration/tests/interactive_rebase/pick_rescheduled.go

@@ -0,0 +1,47 @@
+package interactive_rebase
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/config"
+	. "github.com/jesseduffield/lazygit/pkg/integration/components"
+)
+
+var PickRescheduled = NewIntegrationTest(NewIntegrationTestArgs{
+	Description:  "Makes a pick during a rebase fail because it would overwrite an untracked file",
+	ExtraCmdArgs: []string{},
+	Skip:         false,
+	SetupConfig:  func(config *config.AppConfig) {},
+	SetupRepo: func(shell *Shell) {
+		shell.CreateFileAndAdd("file1", "1\n").Commit("one")
+		shell.UpdateFileAndAdd("file2", "2\n").Commit("two")
+		shell.UpdateFileAndAdd("file3", "3\n").Commit("three")
+	},
+	Run: func(t *TestDriver, keys config.KeybindingConfig) {
+		t.Views().Commits().
+			Focus().
+			Lines(
+				Contains("three").IsSelected(),
+				Contains("two"),
+				Contains("one"),
+			).
+			NavigateToLine(Contains("one")).
+			Press(keys.Universal.Edit).
+			Lines(
+				Contains("pick").Contains("three"),
+				Contains("pick").Contains("two"),
+				Contains("<-- YOU ARE HERE --- one").IsSelected(),
+			).
+			Tap(func() {
+				t.Shell().CreateFile("file3", "other content\n")
+				t.Common().ContinueRebase()
+				t.ExpectPopup().Alert().Title(Equals("Error")).
+					Content(Contains("The following untracked working tree files would be overwritten by merge").
+						Contains("Please move or remove them before you merge.")).
+					Confirm()
+			}).
+			Lines(
+				Contains("pick").Contains("three"),
+				Contains("<-- YOU ARE HERE --- two"),
+				Contains("one"),
+			)
+	},
+})

pkg/integration/tests/test_list.go

@@ -109,6 +109,7 @@ var tests = []*components.IntegrationTest{
 	interactive_rebase.FixupSecondCommit,
 	interactive_rebase.Move,
 	interactive_rebase.MoveInRebase,
+	interactive_rebase.PickRescheduled,
 	interactive_rebase.Rebase,
 	interactive_rebase.RewordFirstCommit,
 	interactive_rebase.RewordLastCommit,