luhn: test-case covering the usage of %5==0 (#2056)

* luhn: test-case covering the usage of %5==0 instead of %10==0 (Closes #2054)

* Fixed typo

Co-authored-by: Peter Tseng <[email protected]>

Co-authored-by: Eric Klatzer <[email protected]>
Co-authored-by: Peter Tseng <[email protected]>

Author: 3 people

exercises/luhn/canonical-data.json

@@ -73,6 +73,15 @@
       },
       "expected": false
     },
+    {
+      "uuid": "7e7c9fc1-d994-457c-811e-d390d52fba5e",
+      "description": "invalid long number with a remainder divisible by 5",
+      "property": "valid",
+      "input": {
+        "value": "1 2345 6789 1234 5678 9013"
+      },
+      "expected": false
+    },
     {
       "uuid": "ad2a0c5f-84ed-4e5b-95da-6011d6f4f0aa",
       "description": "valid number with an even number of digits",