Migrate first block of tests in standalone to standalone_2

tests/standalone_2/io/addlatexhash_test.dart

Index: tests/standalone_2/io/addlatexhash_test.dart
diff --git a/tests/standalone/io/addlatexhash_test.dart b/tests/standalone_2/io/addlatexhash_test.dart
similarity index 98%
rename from tests/standalone/io/addlatexhash_test.dart
rename to tests/standalone_2/io/addlatexhash_test.dart
index 46f8dbcc48f8dc17fc163669f9668c7e0ed73387..a748de2010dffa4ac6a19ef0b846de57c593d95c 100755
--- a/tests/standalone/io/addlatexhash_test.dart
+++ b/tests/standalone_2/io/addlatexhash_test.dart
@@ -73,7 +73,8 @@ testSameHash(String tmpDirPath) {
   // file names/paths for file containing groups of 8 variants of a paragraph
   const par8timesName = "addlatexhash_test_src";
   const par8timesFileName = "$par8timesName.tex";
-  final par8timesDirPath = path.join(dartRootDir, "tests", "standalone", "io");
+  final par8timesDirPath =
+      path.join(dartRootDir, "tests", "standalone_2", "io");
   final par8timesPath = path.join(par8timesDirPath, par8timesFileName);
   final tmpPar8timesPath = path.join(tmpDirPath, par8timesFileName);