Non Empty Lines
You need to count how many non-empty lines a given text has.
An empty line is a line without symbols or the one that contains only spaces.
Input: A text (str).
Output: An integer (int).
Examples:
assert non_empty_lines("one simple line\n") == 1
assert non_empty_lines("") == 0
assert non_empty_lines("\nonly one line\n ") == 1
assert (
non_empty_lines(
"\nLorem ipsum dolor sit amet,\n\nconsectetur adipiscing elit\nNam odio nisi, aliquam\n "
)
== 3
)
