Exercise: palindrome

Write a function is_palindrome(text) that returns True if the string text is a palindrome and False otherwise. A palindrome reads the same from left to right and from right to left, ignoring letter case and spaces.

• is_palindrome("Racecar") → True
• is_palindrome("never odd or even") → True
• is_palindrome("python") → False

Constraints: text consists of Latin or Russian letters and spaces; the empty string is a palindrome.

Do not add extra imports unless the task says so explicitly.