Update README.md

Author: vsilaev

README.md

@@ -616,15 +616,13 @@ httpRequest.raw()
 
 It’s not mandatory to use any specific subclasses of `Executor` with `CompletableTask` – you may use any implementation. However, someone may find beneficial to have a `Promise`-aware `ExecutorService` API. Below is a list of related classes/interfaces:
 
-a. Interface `TaskExecutorService`
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+a. Interface `TaskExecutorService` 
 Specialization of [ExecutorService](https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html) that uses `Promise` as a result of `submit(...)` methods.
 
 b. Class `ThreadPoolTaskExecutor`
 A subclass of the standard [ThreadPoolExecutor](https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ThreadPoolExecutor.html) that implements `TaskExecutorService` interface.
 
 c. Class `TaskExecutors`
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 A drop-in replacement for [Executors](https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Executors.html) utility class that returns various useful implementations of `TaskExecutorService` instead of the standard [ExecutorService](https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html).
 
 # Acknowledgements