Add some descriptions

Author: lizmat

integration/advent2013-day07.t

@@ -3,13 +3,13 @@ use Test;
 plan 6;
 
 # U+2286 SUBSET OF OR EQUAL TO
-  only sub infix:<<"\x2286">>($a, $b --> Bool) {
-      $a (<=) $b;
-  }
+only sub infix:<<"\x2286">>($a, $b --> Bool) {
+    $a (<=) $b;
+}
 
-is(set( <a b c> ) ⊆ set( <a b c d> ), True);
-is(set( <a b c d> ) ⊆ set( <a b c> ), False);
-is(<a b c> ⊆ <a b d>, False);
+is set( <a b c> ) ⊆ set( <a b c d> ), True,  'a b c   ⊆ a b c d';
+is set( <a b c d> ) ⊆ set( <a b c> ), False, 'a b c d ⊆ a b c';
+is <a b c> ⊆ <a b d>, False,                 'a b c   ⊆ a b d';
 
 # in the advent article, it returned False.  Since then, S07:55
 #
@@ -18,7 +18,7 @@ is(<a b c> ⊆ <a b d>, False);
 #
 # is interpreted in such a way that Parcels have become value based,
 # and that means that this test should return True
-is(<a b c> === <a b c>, True);
+is <a b c> === <a b c>, True, 'a b c === a b c';
 
-is(<a b c> eqv <a b c>, True);
-is(set(<a b c>).WHICH, 'Set|Str|a Str|b Str|c');
+is <a b c> eqv <a b c>, True, 'a b c eqv a b c';
+is set(<a b c>).WHICH, 'Set|Str|a Str|b Str|c', 'is .WHICH what we expect';