hush: reinstate hush_test, add testcases for process subst
diff --git a/shell/hush_test/hush-parsing/process_subst.tests b/shell/hush_test/hush-parsing/process_subst.tests
new file mode 100755
index 0000000..f8299a5
--- /dev/null
+++ b/shell/hush_test/hush-parsing/process_subst.tests
@@ -0,0 +1,2 @@
+echo "TEST`echo zz;echo;echo`BEST"
+echo "TEST`echo '$(echo zz)'`BEST"