fix terminal pgrp issue with async jobs in non-interactive shells; history_expand change to first argument

tests/alias.right

@@ -43,3 +43,17 @@ bar
 baz
 <áa>
 <aá>
+bar
+foo bar x
+foo
+x
+bar
+x
+bar
+x
+foo=v bar=
+foo
+foo in v
+bash: -c: line 7: syntax error near unexpected token `do'
+bash: -c: line 7: `do echo foo=$foo bar=$bar'
+foo=v bar=