phone number: only one problem per test input (#1959)

* [Phone Number] Only one problem per test input

Because the area code is not allowed to start with 0 or 1, inputs designed to elicit other errors should not use area codes that start with either of those digits.

* Respect immutability

* Correct field name: s/comment/comments/

* Comments should contain a list.

* Allow prettier to improve comments

Author: astrieanna

exercises/phone-number/canonical-data.json

@@ -95,6 +95,21 @@
         "error": "letters not permitted"
       }
     },
+    {
+      "uuid": "eb8a1fc0-64e5-46d3-b0c6-33184208e28a",
+      "reimplements": "63f38f37-53f6-4a5f-bd86-e9b404f10a60",
+      "comments": [
+        "make input invalid only due to letters; area code may not start with 1"
+      ],
+      "description": "invalid with letters",
+      "property": "clean",
+      "input": {
+        "phrase": "523-abc-7890"
+      },
+      "expected": {
+        "error": "letters not permitted"
+      }
+    },
     {
       "uuid": "4bd97d90-52fd-45d3-b0db-06ab95b1244e",
       "description": "invalid with punctuations",
@@ -106,6 +121,21 @@
         "error": "punctuations not permitted"
       }
     },
+    {
+      "uuid": "065f6363-8394-4759-b080-e6c8c351dd1f",
+      "reimplements": "4bd97d90-52fd-45d3-b0db-06ab95b1244e",
+      "comments": [
+        "make input invalid only due to punctuation; area code may not start with 1"
+      ],
+      "description": "invalid with punctuations",
+      "property": "clean",
+      "input": {
+        "phrase": "523-@:!-7890"
+      },
+      "expected": {
+        "error": "punctuations not permitted"
+      }
+    },
     {
       "uuid": "d77d07f8-873c-4b17-8978-5f66139bf7d7",
       "description": "invalid if area code starts with 0",