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

shell/hush_test/hush-bugs/quote3.right

@@ -1,3 +0,0 @@
-Testing: in $empty""
-..
-Finished

shell/hush_test/hush-bugs/quote3.tests

@@ -1,8 +0,0 @@
-if test $# = 0; then
-    exec "$THIS_SH" quote3.tests abc "d e"
-fi
-
-echo 'Testing: in $empty""'
-empty=''
-for a in $empty""; do echo ".$a."; done
-echo Finished

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

shell/hush_test/hush-parsing/quote3.tests

@@ -0,0 +1,21 @@
+empty=''
+
+echo 'Testing: in ""'
+for a in ""; do echo ".$a."; done
+
+echo 'Testing: in '"''"
+for a in ''; do echo ".$a."; done
+
+echo 'Testing: in $empty'
+for a in $empty; do echo ".$a."; done
+
+echo 'Testing: in $empty""'
+for a in $empty""; do echo ".$a."; done
+
+echo 'Testing: in $empty'"''"
+for a in $empty''; do echo ".$a."; done
+
+echo 'Testing: in "$empty"'
+for a in "$empty"; do echo ".$a."; done
+
+echo Finished