anagram 1.4.0: words are not anagrams of themselves

The logical extension of Banana not being an anagram of BANANA must be
that words are never anagrams of themselves, and that the test "capital
word is not own anagram" only tests this for case insensitivity.

1.2.1: no-op, comment change
exercism/problem-specifications#1280
1.3.0: no-op, property change
exercism/problem-specifications#1301
1.4.0: case-insensitive
exercism/problem-specifications#1348

Author: sshine

exercises/anagram/source/anagram/AnagramTest.ceylon

@@ -2,7 +2,7 @@ import ceylon.test {
     ...
 }
 
-// Tests adapted from problem-specifications version 1.2.0
+// Tests adapted from problem-specifications version 1.4.0
 
 {[String, {String*}, {String*}]*} cases => {
     // no matches
@@ -31,8 +31,8 @@ import ceylon.test {
     ["go", { "go Go GO" }, {}],
     // anagrams must use all letters exactly once
     ["tapper", { "patter" }, {}],
-    // capital word is not own anagram
-    ["BANANA", { "Banana" }, {}]
+    // words are not anagrams of themselves (case-insensitive)
+    ["BANANA", { "BANANA", "Banana", "banana" }, {}]
 };
 
 test