examples: lang: Fixup a few examples

We might change unification to allow naked single strings with fancier
unification, but let's leave it as is for now and see how often it comes
up.

examples/lang/class-include-nested0.mcl

@@ -1,19 +1,19 @@
 $top = "top-level"
 class base($s) {
-	test "middle " + $s {}
+	test ["middle " + $s,] {}
 	$middle = "inside base"
 }
 
 # syntactic sugar for the equivalent of defining a class `inner` inside of base.
 class base:inner($s) {
-	test "inner " + $s {}
+	test ["inner " + $s,] {}
 
 	$last = "i am inner and i can see " + $middle
 }
 
 include base("world") as b1
 include b1.inner("hello") as b2	# inner comes out of `base`
 
-test $top {}
-test $b1.middle {}
-test $b2.last {}
+test [$top,] {}
+test [$b1.middle,] {}
+test [$b2.last,] {}

examples/lang/class-include-nested1.mcl

@@ -1,25 +1,25 @@
 $top = "top-level"
 class base($s) {
-	test "middle " + $s {}
+	test ["middle " + $s,] {}
 	$middle = "inside base"
 }
 
 # syntactic sugar for the equivalent of defining a class `inner` inside of base.
 class base:inner1($s) {
-	test "inner1 " + $s {}
+	test ["inner1 " + $s,] {}
 
 	$last = "i am inner1 and i can see " + $middle
 }
 
 class base:inner2($s) {
-	test "inner2 " + $s {}
+	test ["inner2 " + $s,] {}
 
 	$last = "i am inner2 and i can see " + $middle
 }
 
 # three deep!
 class base:inner1:deep($s, $b) {
-	test "deep is " + $s {}
+	test ["deep is " + $s,] {}
 
 	$end = "i am deep and i can see " + $middle + " and last says " + $last
 }
@@ -29,8 +29,8 @@ include b0.inner1("hello") as b1	# inner comes out of `base`
 include b0.inner2("hello") as b2	# inner comes out of `base`
 include b1.deep("deep", true) as d	# deep comes out of `inner1`
 
-test $top {}
-test $b0.middle {}
-test $b1.last {}
-test $b2.last {}
-test $d.end {}
+test [$top,] {}
+test [$b0.middle,] {}
+test [$b1.last,] {}
+test [$b2.last,] {}
+test [$d.end,] {}