fix: @putout/plugin-remove-useless-variables: assignment

Author: coderaiser

packages/plugin-remove-useless-variables/README.md

@@ -39,7 +39,7 @@ npm i @putout/plugin-remove-useless-variables -D
 
 ## assignment
 
-Checkout in 🐊[**Putout Editor**](https://putout.cloudcmd.io/#/gist/a2f7fe5e2c294443576f95dce6fde67e/342492c8b9de8e36e469c8f543fc0f2b7d2df73c).
+Checkout in 🐊[**Putout Editor**](https://putout.cloudcmd.io/#/gist/a2f7fe5e2c294443576f95dce6fde67e/0699ccb4f7335e8e3f80de891913a8e3ad4f35e3).
 
 ### ❌ Example of incorrect code
 

packages/plugin-remove-useless-variables/lib/assignment/fixture/assignment-fix.js

@@ -1,7 +1,7 @@
 function notReferenced() {
     let files = [];
 
-    while (!readDirectory(parentDir)) {}}
+    while (!readDirectory(parentDir).length) {}}
 
 function referenced() {
     let files = [];

packages/plugin-remove-useless-variables/lib/assignment/index.js

@@ -24,5 +24,6 @@ module.exports.match = () => ({
 });
 
 module.exports.replace = () => ({
-    '(__a = __b).__c': '__b',
+    '(__a = __b).__c': '__b.__c',
 });
+