Some edits

Author: gadilashashank

book/languages/erlang/intro.md

@@ -2,11 +2,12 @@
 
 ## Inception
 
-**Erlang** firstly appeared in the Ericsson laboratory and it is successfully used in projects requiring **high scalability and resistance to failures**.
+**Erlang** first appeared in the Ericsson laboratory and it is successfully used in projects requiring **high scalability and resistance to failures**.
 
 It is a **functional**, **dynamic language** with strict typing in which the main focus was on concurrency and **processing capabilities distributed**.
 
-Erlang **was a proprietary programming language** used by **Ericsson**, but since **1998** when the source code was opened, is gaining popularity day by day.
+Erlang **was a proprietary programming language** used by **Ericsson**, but since **1998** when the source code was open sourced
+and is gaining popularity day by day.
 
 It is successfully used in **commercial products** (for example: **WhatsApp**) around the world that go many times beyond its **telecommunications roots**.
 
@@ -50,4 +51,4 @@ It is successfully used in **commercial products** (for example: **WhatsApp**) a
 * **Support for multiprocessor systems**
 
     From the **R11** version, Erlang's environment *can* automatically exploit the potential hidden in multi-core processors and systems multiprocessor.
-    Previously, to use such a system belonged run several copies of the virtual machine, which unfortunately increased memory consumption, and increased the cost of sending messages unnecessarily between processes on one computer.
+    Previously, to use such a system belonged run several copies of the virtual machine, which unfortunately increased memory consumption, and increased the cost of sending messages unnecessarily between processes on one computer.