Update README.md

README.md

@@ -17,21 +17,22 @@ Or install it yourself as:
     $ gem install financial_maths
 
 ## Usage
- ```ruby
-	require "financial_maths"
-	
-	include FinancialMaths
-	
-	calculate = Credit.new
-	```
+```ruby
+require "financial_maths"
+
+include FinancialMaths
+
+calculate = Credit.new
+```
 
 ### Calculate Fixed payment equity
-	A credit in a period of 15 years, the amount is $100.000.000 and the interest is 1.44594763%, 
-	call the method following the next instruction.
-	
-	calculate.fixed_payment_equity(15,100000000,0.0144594763)
+A credit in a period of 15 years, the amount is $100.000.000 and the interest is 1.44594763%, 
+call the method following the next instruction.
 
-	The result is a hash with the plan of payments, it looks like that
+```ruby
+calculate.fixed_payment_equity(15,100000000,0.0144594763)
+```
+The result is a hash with the plan of payments, it looks like that
 
 	[{:period=>0, :monthly_payment=>nil, :interest=>nil, :payment=>nil, :balance=>100000000}, 
 	{:period=>1, :payment=>2001502.63, :interest=>1445947.63, :monthly_payment=>555555, :balance=>99444445},