README.md in loog-0.3.1 vs README.md in loog-0.4.0

@@ -1,8 +1,7 @@
 <img src="/logo.svg" width="64px" height="64px"/>
 
-[![Managed by Zerocracy](https://www.0crat.com/badge/C3RFVLU72.svg)](https://www.0crat.com/p/C3RFVLU72)
 [![EO principles respected here](https://www.elegantobjects.org/badge.svg)](https://www.elegantobjects.org)
 [![DevOps By Rultor.com](http://www.rultor.com/b/yegor256/loog)](http://www.rultor.com/p/yegor256/loog)
 [![We recommend RubyMine](https://www.elegantobjects.org/rubymine.svg)](https://www.jetbrains.com/ruby/)
 
 [![rake](https://github.com/yegor256/loog/actions/workflows/rake.yml/badge.svg)](https://github.com/yegor256/loog/actions/workflows/rake.yml)
@@ -30,10 +29,12 @@
 
 The gem is basically a provider of a few pre-configured loggers, which
 you can use for production (`Loog::REGULAR`) or for testing (`Loog::VERBOSE`).
 You can also shut it up with `Loog::NULL`.
 
-That's it.
+There is also `Logger::Buffer` class that you can use for testing. 
+It accumulates all log calls and then returns the entire output
+through the `to_s()` method.
 
 ## How to contribute
 
 Read [these guidelines](https://www.yegor256.com/2014/04/15/github-guidelines.html).
 Make sure you build is green before you contribute