hush: fix remaining known two bugs with IFS expansion. Closes 4027.

function                                             old     new   delta
expand_vars_to_list                                 1054    1140     +86
parse_stream                                        2425    2479     +54
expand_on_ifs                                        258     310     +52
builtin_umask                                        133     132      -1
done_word                                            820     779     -41
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/2 up/down: 192/-42)           Total: 150 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/shell/hush_test/hush-parsing/starquoted2.right b/shell/hush_test/hush-parsing/starquoted2.right
index e1562ed..1bff408 100644
--- a/shell/hush_test/hush-parsing/starquoted2.right
+++ b/shell/hush_test/hush-parsing/starquoted2.right
@@ -1,4 +1,7 @@
 Should be printed
+Would not be printed by bash
+Would not be printed by bash
+Would not be printed by bash
 Should be printed
 Empty:
 Empty: