README-en.md edited online with Bitbucket

README-en.md

 
 1. Reviewed basic concepts related to repetition structures.
 
-2. Reviewed the string class in C++. In particular, how to create string objects and the `length`, `toupper` and `push_back` methods.  Also review the `isalpha` function and character arithmetic.
+2. Reviewed basic concepts of the `string` class in C++, the functions `length`, `toupper`, `push_back` and `isalpha` and character arithmetic.
 
 3. Watched Khan Academy’s "Ceasar Cypher" video at https://www.youtube.com/watch?v=sMOZf4GN3oc .