fix: apply code reivew

docs/rules/jsx-boolean-value.md

@@ -14,11 +14,11 @@ This rule will enforce one or the other to keep consistency in your code.
 
 This rule takes two arguments. If the first argument is `"always"` then it warns whenever an attribute is missing its value. If `"never"` then it warns if an attribute has a `true` value. The default value of this option is `"never"`.
 
-The second argument is optional. if provided, it must be an object. Three property is available.
+The second argument is optional. if provided, it must be an object. These properties are supported:
 
 First, the `"never"` and `"always"` properties are one set. The two properties cannot be set together. `"never"` must be used when the first argument is `"always"` and `"always"`  must be used when the first argument is `"never"`. This property’s value must be an array of strings representing prop names.
 
-The other is `"assumeUndefinedIsFalse"`. The default value of this option is false. if the first argument is  `"never"`  or the property of the second argument contains  `"never"` , the corresponding property cannot have false.
+When the first argument is `"never"`, a boolean `"assumeUndefinedIsFalse"` may be provided, which defaults to `false`. When `true`, an absent boolean prop will be treated as if it were explicitly set to `false`.
 
 Examples of **incorrect** code for this rule, when configured with `"never"`, or with `"always", { "never": ["personal"] }`:
 

lib/rules/jsx-boolean-value.js

@@ -60,17 +60,6 @@ function isNever(configuration, exceptions, propName) {
   }
   return isException;
 }
-/**
- * @param {object} configObject
- * @returns {object} configObject
- */
-function configObjectDefaultSetting(configObject) {
-  const defaultObject = Object.assign({}, configObject);
-  if (defaultObject.assumeUndefinedIsFalse === undefined) {
-    defaultObject.assumeUndefinedIsFalse = false;
-  }
-  return defaultObject;
-}
 
 const messages = {
   omitBoolean: 'Value must be omitted for boolean attributes{{exceptionsMessage}}',
@@ -111,8 +100,7 @@ module.exports = {
               type: 'boolean',
             },
           },
-        },
-        ],
+        }],
         additionalItems: false,
       }, {
         type: 'array',
@@ -127,17 +115,15 @@ module.exports = {
               type: 'boolean',
             },
           },
-        },
-        ],
+        }],
         additionalItems: false,
-      },
-      ],
+      }],
     },
   },
 
   create(context) {
     const configuration = context.options[0] || NEVER;
-    const configObject = configObjectDefaultSetting(context.options[1]);
+    const configObject = context.options[1] || {};
     const exceptions = new Set((configuration === ALWAYS ? configObject[NEVER] : configObject[ALWAYS]) || []);
 
     return {
@@ -161,7 +147,7 @@ module.exports = {
         }
         if (
           isNever(configuration, exceptions, propName)
-          && configObject.assumeUndefinedIsFalse === false
+          && !configObject.assumeUndefinedIsFalse
           && value
           && value.type === 'JSXExpressionContainer'
           && value.expression.value === true