bug fix

Author: nakov

Content/Preface/how-to-become-a-programmer/how-to-become-a-programmer.md

@@ -47,7 +47,7 @@ The current book develops the **beginner level of algorithmic thinking**, but it
 
 As you can guess **the programming language doesn't matter** for the development of algorithmic thinking. To think logically is a universal skill, and it's not related only to programming. Because of the well-developed logical thinking it's believed that programmers are smart people, and that a stupid person can't become a programmer.
 
-## Skill \# 3 – Computer Science and Software Engineering Concepts \(25%\)
+## Skill \#3 – Computer Science and Software Engineering Concepts \(25%\)
 
 **Fundamental knowledge and skills** for programming, software development, software engineering and computer science comprise around 25% of the developer's minimum skills to start a job. Here are the more important of these skills and knowledge: