Move test of \a regex character to optional/format/regex

This was validating "\\a" as a schema `pattern` described by the meta-schema as format: regex. This moves it to directly test the pattern against a format: regex schema.

Author: notEthan

tests/draft-next/optional/ecmascript-regex.json

@@ -405,20 +405,6 @@
             }
         ]
     },
-    {
-        "description": "\\a is not an ECMA 262 control escape",
-        "schema": {
-            "$schema": "https://json-schema.org/draft/next/schema",
-            "$ref": "https://json-schema.org/draft/next/schema"
-        },
-        "tests": [
-            {
-                "description": "when used as a pattern",
-                "data": { "pattern": "\\a" },
-                "valid": false
-            }
-        ]
-    },
     {
         "description": "pattern with non-ASCII digits",
         "schema": {

tests/draft-next/optional/format/regex.json

@@ -45,6 +45,11 @@
                 "description": "a regular expression with unclosed parens is invalid",
                 "data": "^(abc]",
                 "valid": false
+            },
+            {
+                "description": "\\a is not an ECMA 262 control escape",
+                "data": "\\a",
+                "valid": false
             }
         ]
     }

tests/draft2020-12/optional/ecmascript-regex.json

@@ -405,20 +405,6 @@
             }
         ]
     },
-    {
-        "description": "\\a is not an ECMA 262 control escape",
-        "schema": {
-            "$schema": "https://json-schema.org/draft/2020-12/schema",
-            "$ref": "https://json-schema.org/draft/2020-12/schema"
-        },
-        "tests": [
-            {
-                "description": "when used as a pattern",
-                "data": { "pattern": "\\a" },
-                "valid": false
-            }
-        ]
-    },
     {
         "description": "pattern with non-ASCII digits",
         "schema": {

tests/draft2020-12/optional/format/regex.json

@@ -45,6 +45,11 @@
                 "description": "a regular expression with unclosed parens is invalid",
                 "data": "^(abc]",
                 "valid": false
+            },
+            {
+                "description": "\\a is not an ECMA 262 control escape",
+                "data": "\\a",
+                "valid": false
             }
         ]
     }