hush: fix '{ false; echo $?; }' bug.
hush: expand testsuite. variable expansion is still very broken

diff --git a/shell/hush_test/hush-bugs/quote1.right b/shell/hush_test/hush-bugs/quote1.right
new file mode 100644
index 0000000..cb38205
--- /dev/null
+++ b/shell/hush_test/hush-bugs/quote1.right
@@ -0,0 +1 @@
+'1'