In your first line of code, x.strip doesn’t modify the actual list item in the array, so when you append x to love_maybe_lines, you’re merely appending the original item.
This is more obvious when you insert a print statement:
for x in love_maybe_lines:
print(x) -> "Always "
print(x.strip()) -> "Always"
print(x) -> "Always "
love_maybe_lines_stripped.append(x)
You create the correct value but it’s never used so it’s immediately trashed.