Add ' to some properties of the errors messages

Author: 98teg

doc/files/JSON-CONFIG-FILE.md

@@ -142,7 +142,7 @@ Returned error:
     {
         "error": JSONProperty.Errors.OBJECT_ONE_IS_REQUIRED,
         "properties": ["student", "employee"],
-        "as_text": "One of this properties needs to be specified: student, employee."
+        "as_text": "One of this properties needs to be specified: ['student', 'employee']."
     }
 ]
 ```
@@ -167,7 +167,7 @@ Returned error:
     {
         "error": JSONProperty.Errors.OBJECT_EXCLUSIVITY_ERROR,
         "properties": ["student", "employee"],
-        "as_text": "This properties can not be present at the same time: student, employee."
+        "as_text": "This properties can not be present at the same time: ['student', 'employee']."
     }
 ]
 ```

doc/files/JSON-PROPERTY-OBJECT.md

@@ -176,7 +176,7 @@ Returned error:
         "error": JSONProperty.Errors.OBJECT_ONE_IS_REQUIRED,
         "properties": ["student", "employee"],
         "context": "person",
-        "as_text": "One of this properties needs to be specified: student, employee, at 'person'."
+        "as_text": "One of this properties needs to be specified: ['student', 'employee'], at 'person'."
     }
 ]
 ```
@@ -204,7 +204,7 @@ Returned error:
         "error": JSONProperty.Errors.OBJECT_EXCLUSIVITY_ERROR,
         "properties": ["student", "employee"],
         "context": "person",
-        "as_text": "This properties can not be present at the same time: student, employee, at 'person'."
+        "as_text": "This properties can not be present at the same time: ['student', 'employee'], at 'person'."
     }
 ]
 ```

json_config_file/json_properties/json_property.gd

@@ -128,11 +128,13 @@ const MESSAGE_WITHOUT_CONTEXT = "."
 static func _array_as_text(array: Array) -> String:
 	var array_as_text = ""
 
-	for i in array.size():
+	for i in range(array.size()):
 		if i == 0:
-			array_as_text = String(array[0])
+			array_as_text = "['" + String(array[0]) + "'"
+		elif i == array.size() - 1:
+			array_as_text = array_as_text + ", '" + String(array[i]) + "']"
 		else:
-			array_as_text = array_as_text + ", " + String(array[i])
+			array_as_text = array_as_text + ", '" + String(array[i]) + "'"
 
 	return array_as_text