Another thinko corrected.

As PerlJam++ noted, circumfix:<< >> declarations don't have commas.

src/Perl6/World.nqp

@@ -2471,40 +2471,12 @@ class Perl6::World is HLL::World {
                     # if we have something here, it's probably a Slip,
                     # which stringifies fine but has to be split at ','
                     # and potentially whitespace-corrected
-                    my @parts := nqp::split(',', ~$result);
+                    my @parts := nqp::split(' ', ~$result);
                     if +@parts > 2 {
                         # there's no foofix that allows more than two parts
                         $/.CURSOR.panic($mkerr());
                     }
-                    my $l-delim;
-                    my $r-delim;
-                    my @delims;
-                    for @parts -> $part {
-                        my $l-ws := 0;
-                        my $r-ws := nqp::chars($part);
-                        my $l-done := 0;
-                        my $r-done := 0;
-                        while 1 {
-                            last if $l-done && $r-done;
-                            if nqp::eqat($part, ' ', $l-ws) {
-                                $l-ws := $l-ws + 1;
-                            }
-                            else {
-                                $l-done := 1;
-                            }
-                            if nqp::eqat($part, ' ', $r-ws) {
-                                $r-ws := $r-ws - 1;
-                            }
-                            else {
-                                $r-done := 1;
-                            }
-                        }
-                        $part := nqp::substr($part, $l-ws, $r-ws);
-                        nqp::push(@delims, $part);
-                        $/.CURSOR.panic($mkerr()) if nqp::index($part, ' ') != -1;
-                    }
-                    nqp::say("got: " ~ nqp::join(" ", @delims) ~ ".");
-                    return nqp::join(" ", @delims);
+                    return nqp::join(" ", @parts);
                     CONTROL {
                         # we might get a warning from evaluating a Block
                         $/.CURSOR.panic($mkerr());