This sentence should have a line-height of twice the normal amount, which should cause some spacing that would not otherwise be seen. Extra Text MM MMMMMMMM MMMMM MMMMMMMMMMM MMMMMMMM MMMMMM MM MMMMMMMM MMMMM MMMMMMMMMMM MMMMMMMM MMMMMM MM MMMMMMMM MMMMM MMMMMMMMMMM

This sentence with normal line-height is for comparison. Extra Text MM MMMMMMMM MMMMM MMMMMMMMMMM MMMMMMMM MMMMMM MM MMMMMMMM MMMMM MMMMMMMMMMM MMMMMMMM MMMMMM MM MMMMMMMM MMMMM MMMMMMMMMMM