Update 4.md

Author: gammasoft71

docs/documentation/tips_and_tricks/4.md

@@ -40,11 +40,11 @@ Yes, of course you can store your own type in [xtd::collections::array_list](htt
 #include <xtd/xtd>
 
 struct foo {
-  int value;
-  
   bool operator ==(const foo& f) const noexcept {return value == f.value;}
   bool operator <(const foo& f) const noexcept {return value < f.value;}
   bool operator >(const foo& f) const noexcept {return value > f.value;}
+
+  int value;  
 };
 
 struct bar : public icomparable<bar>, public iequatable<bar> {
@@ -55,7 +55,6 @@ struct bar : public icomparable<bar>, public iequatable<bar> {
   bool equals(const bar& obj) const noexcept override {return value == obj.value;}
 
   int value;
-  
 };
 
 auto main() -> int {
@@ -83,7 +82,8 @@ auto main() -> int {
 ```
 
 *	The only constraint is declaring at least the following three operators: `==`, `<` and `>` as in the example with the `foo` structure.
-* Or to inherit the interfaces [xtd::icomparable](https://gammasoft71.github.io/xtd/reference_guides/latest/classxtd_1_1icomparable.html) and [xtd::iequatable](https://gammasoft71.github.io/xtd/reference_guides/latest/classxtd_1_1iequatable.html) as in the example with the structure `bar`.
+* Or to inherit the interfaces [xtd::icomparable](https://gammasoft71.github.io/xtd/reference_guides/latest/classxtd_1_1icomparable.html) and [xtd::iequatable](https://gammasoft71.github.io/xtd/reference_guides/latest/classxtd_1_1iequatable.html) as in the example with the structure `bar`. 
+  Indeed, the interface [xtd::icomparable](https://gammasoft71.github.io/xtd/reference_guides/latest/classxtd_1_1icomparable.html) automatically creates comparison operators and the interface [xtd::iquatable](https://gammasoft71.github.io/xtd/reference_guides/latest/classxtd_1_1iquatable.html) also automatically creates equality and inequality operators.
 
 ## Conclusion