pythongh-97914: Reword misleading sentence on conditional expressions (python#139064)

Co-authored-by: Gilles Peiffer <gilles.peiffer.yt@gmail.com>
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>

Author: 3 people

Doc/reference/expressions.rst

@@ -1938,8 +1938,9 @@ Conditional expressions
    conditional_expression: `or_test` ["if" `or_test` "else" `expression`]
    expression: `conditional_expression` | `lambda_expr`
 
-Conditional expressions (sometimes called a "ternary operator") have the lowest
-priority of all Python operations.
+A conditional expression (sometimes called a "ternary operator") is an
+alternative to the if-else statement. As it is an expression, it returns a value
+and can appear as a sub-expression.
 
 The expression ``x if C else y`` first evaluates the condition, *C* rather than *x*.
 If *C* is true, *x* is evaluated and its value is returned; otherwise, *y* is