Complete reworking of the REPL

which is good in itself, but not what I was meant to be working on.

unit-tests/lambda.sh

@@ -1,10 +1,11 @@
 #!/bin/bash
 
-expected='(lambda (l) l)(1 2 3 4 5 6 7 8 9 10)'
-actual=`target/psse 2>/dev/null <<EOF
+expected='(lambda (l) l) (1 2 3 4 5 6 7 8 9 10)'
+output=`target/psse 2>/dev/null <<EOF
 (set! list (lambda (l) l))
 (list '(1 2 3 4 5 6 7 8 9 10))
 EOF`
+actual=`echo $output | tail -1`
 
 if [ "${expected}" = "${actual}" ]
 then