test(processor): git-mode whole-file and line-range cases

internal/processor/testdata/git_range.js

@@ -0,0 +1,2 @@
+a(); // one
+b(); // two

internal/processor/testdata/git_range.js.golden

@@ -0,0 +1,2 @@
+a();
+b(); // two

internal/processor/testdata/git_whole.py

@@ -0,0 +1,2 @@
+# gone
+x = 1  # inline

internal/processor/testdata/git_whole.py.golden

@@ -0,0 +1 @@
+x = 1

internal/processor/wholefile_test.go

@@ -108,6 +108,9 @@ func TestWholeFile(t *testing.T) {
 			cli: types.CLI{PreserveLines: true}},
 		{name: "--backup writes .bak of original", file: "py_backup.py",
 			cli: types.CLI{Backup: true}, wantBackup: true},
+		{name: "git whole file (untracked, nil ranges)", file: "git_whole.py", gitMode: true},
+		{name: "git range limits stripping to changed lines", file: "git_range.js",
+			gitMode: true, ranges: []git.LineRange{{Start: 1, End: 1}}},
 	}
 
 	for _, tc := range cases {