docs: revised 05_Conditional expression.md

revised the text.

Author: p7nov

examples/02_control_flow/05_Conditional expression.md

@@ -1,7 +1,6 @@
 # Conditional Expression
 
-There is no ternary operator (condition ? then : else) in Kotlin instead `if` expression could be used in the same way.
-Let's take a look
+There is no ternary operator `condition ? then : else` in Kotlin. Instead, `if` may be used as an expression:
 
 <div class="language-kotlin" theme="idea" data-min-compiler-version="1.3">
 
@@ -17,4 +16,4 @@ fun main() {
 
 </div>
 
-1. `if` is an expression, i.e. it returns a value.
+1. `if` is an expression here, i.e. it returns a value.