Commentary

Additional description
Create Inheritance.md

Complex numbers as an inherited class.
Added inheritance and friends

Expanding the Spiral learning section
Fixed broken links in introductory paragraphs of Decorator tutorial.
Update String Formatting.md

Added solution to the Spanish version
Update Variables and Types
Update Scalars
Update Arrays
Update Hashes
Create Loops
Create Operators
Create References
Create Subroutines
Create Regular Expressions
Update Basic Operators.md
Added missing brackets to examples
Small fixes
Update Regular Expressions
Update Regular Expressions
Modified file using Dillinger