hush: readability improvements.

fix some more obscure bugs.
 a new redir4.tests is known to fail.

shell/hush_test/hush-misc/redir1.right

@@ -1,3 +1,5 @@
+Test 0:  var:ok
+File created:ok
 Test 1:  var:ok
 File created:ok
 Test 2:  var:ok

shell/hush_test/hush-misc/redir1.tests

@@ -1,3 +1,9 @@
+rm shell_test_$$ 2>/dev/null
+var=bad
+>shell_test_$$ var=ok
+echo "Test 0:  var:$var"
+test -f shell_test_$$ && echo "File created:ok"
+
 rm shell_test_$$ 2>/dev/null
 var=bad
 var=ok >shell_test_$$

shell/hush_test/hush-misc/redir4.right

@@ -0,0 +1,25 @@
+shell_test
+\shell_test
+\shell_test
+\shell_test
+Here1
+Ok1
+Here2
+Ok2
+Here3
+Ok3
+Here4
+Ok4
+How with variable refs
+shell_test_1
+\shell_test_1
+\shell_test_1
+\shell_test_1
+Here1
+Ok1
+Here2
+Ok2
+Here3
+Ok3
+Here4
+Ok4

shell/hush_test/hush-misc/redir4.tests

@@ -0,0 +1,80 @@
+rm *shell_test* 2>/dev/null
+
+>\shell_test
+echo *shell_test*
+rm *shell_test*
+
+>\\shell_test
+echo *shell_test*
+rm *shell_test*
+
+>"\shell_test"
+echo *shell_test*
+rm *shell_test*
+
+>"\\shell_test"
+echo *shell_test*
+rm *shell_test*
+
+
+cat <<\shell_test
+Here1
+shell_test
+echo Ok1
+
+cat <<\\shell_test
+Here2
+\shell_test
+echo Ok2
+
+cat <<"\shell_test"
+Here3
+\shell_test
+echo Ok3
+
+cat <<"\\shell_test"
+Here4
+\shell_test
+echo Ok4
+
+
+echo How with variable refs
+i=1
+
+
+>\shell_test_$i
+echo *shell_test*
+rm *shell_test*
+
+>\\shell_test_$i
+echo *shell_test*
+rm *shell_test*
+
+>"\shell_test_$i"
+echo *shell_test*
+rm *shell_test*
+
+>"\\shell_test_$i"
+echo *shell_test*
+rm *shell_test*
+
+
+cat <<\shell_test_$i
+Here1
+shell_test_$i
+echo Ok1
+
+cat <<\\shell_test_$i
+Here2
+\shell_test_$i
+echo Ok2
+
+cat <<"\shell_test_$i"
+Here3
+\shell_test_$i
+echo Ok3
+
+cat <<"\\shell_test_$i"
+Here4
+\shell_test_$i
+echo Ok4