rename another Complex class → ComplexNumber

Author: YaroslavMayorov

Classes and objects/Special __init__ method/task.md

@@ -23,13 +23,13 @@ The `__init__()` method may receive arguments for greater flexibility.
 In that case, arguments given to the class instantiation operator are passed 
 on to `__init__()`. For example:
 ```python
-class Complex:
+class ComplexNumber:
     def __init__(self, real_part, imag_part):
         self.r = real_part
         self.i = imag_part
         self.num = complex(self.r, self.i)
 
-x = Complex(3.0, -4.5)  # Instantiating a complex number
+x = ComplexNumber(3.0, -4.5)  # Instantiating a complex number
 x.num
 ```
 ```text

Classes and objects/__str__ vs __repr__/task.md

@@ -24,7 +24,7 @@ defined in the object's class.
 
 Our own defined class should therefore have a `__repr__` if we need detailed information for debugging. 
 Also, if we think it would be useful to have a string representation for users, we should create 
-a `__str__` function. Check out another approach to representing complex numbers using the `ComplexNumber` class in the code editor. Run the code
+a `__str__` function. Check out another implementation of the class `ComplexNumber` in the code editor. Run the code
 to see what each of the two `print` statements prints.
 
 For more structured and detailed information, you can refer to [this Hyperskill knowledge base page](https://hyperskill.org/learn/step/7139#str__-vs-__repr?utm_source=jba&utm_medium=jba_courses_links).