Add more escape tests to process_shell_test.

tests/standalone/io/process_shell_test.dart

Index: tests/standalone/io/process_shell_test.dart
diff --git a/tests/standalone/io/process_shell_test.dart b/tests/standalone/io/process_shell_test.dart
index add0c9fca7ca8cee3b536b465617dcd63f432ca2..6b436bd7ebb7b0d565fa4e3dbfd91846fd01970e 100644
--- a/tests/standalone/io/process_shell_test.dart
+++ b/tests/standalone/io/process_shell_test.dart
@@ -33,6 +33,8 @@ void testRunShell() {
   test(["'\"\"'", "\"'\"'"]);
   test(["'\$HOME'"]);
   test(["'\$tmp'"]);
+  test(["arg'"]);
+  test(["arg\\'"]);

[kustermann, 2013/05/23 10:26:38]

If you want to make sure that escaping works correctly, you have to use more
than one argument.

[Anders Johnsen, 2013/05/23 15:22:57]

Done.

 }

[kustermann, 2013/05/23 10:26:38]

I've one more question regarding the functionality of this. Should I be able to
determine the home directory like this?
Process.runShell("echo", [r"$HOME"])

[Anders Johnsen, 2013/05/23 15:22:57]

Please see https://codereview.chromium.org/15883003/.

 
 void testShell() {