Revert "Revert "Test Array.gist limits output to 100 els""

This reverts commit 1b814c6.

S02-types/array.t

@@ -2,7 +2,7 @@ use v6;
 
 use Test;
 
-plan 103;
+plan 104;
 
 #L<S02/Mutable types/Array>
 
@@ -390,4 +390,17 @@ subtest 'flat propagates .is-lazy' => {
     is-deeply flat(42 xx 1) .is-lazy, False, 'sub, False';
 }
 
+subtest '.gist shows only first 100 els' => {
+    plan 5;
+    sub make-gist ($a, $extras?) {
+        "[$a" ~ (" $extras" with $extras) ~ ']'
+    }
+
+    is  [<1 2 3>].gist, '[1 2 3]', 'gist gives useful value';
+    is-deeply [1..100] .gist, make-gist([1..100]       ), '100 els';
+    is-deeply [1..101] .gist, make-gist([1..100], '...'), '101 els';
+    is-deeply [1..102] .gist, make-gist([1..100], '...'), '102 els';
+    is-deeply [1..1000].gist, make-gist([1..100], '...'), '1000 els';
+}
+
 # vim: ft=perl6