hush: expand quote3.tests and move from hush-bugs to hush-parsing

diff --git a/shell/hush_test/hush-parsing/quote3.right b/shell/hush_test/hush-parsing/quote3.right
new file mode 100644
index 0000000..bbe46df
--- /dev/null
+++ b/shell/hush_test/hush-parsing/quote3.right
@@ -0,0 +1,12 @@
+Testing: in ""
+..
+Testing: in ''
+..
+Testing: in $empty
+Testing: in $empty""
+..
+Testing: in $empty''
+..
+Testing: in "$empty"
+..
+Finished