Truncation occurs even when initial height is equal to max height

[iankameron]

Example of the issue:
If you have text that fits into two lines and you are clamping to 2 lines, truncation/clamping is unnecessary. However, with the current version you'll lose the last letter of the text and it will be replaced by the ellipsis.
So you might expect:

clamp.js is a fun way
to clamp text

But you get

clamp.js is a fun way
to clamp tex...

This issue seems to be caused by line 221, which calls the initial truncate even when the height matches the max height.
if (height <= element.clientHeight) {

Changing this to a simple '<' seems to fix the problem.