paper-autogrow-textarea maxrows only works with new lines, not if it's all one paragraph

[davenotik]

With maxrows=10 add 15 lines, and you see it stops height at 10. With a bunch of repeated text without new lines, note that the height has no (?) limit.

[clayrisser]

It does the same for me, but only when I do not put spaces between the characters, so as long as the user isn't typing a super long string it isn't a problem. However, it does seem a little odd to me that this is inconsistent with the way iron-autogrow-textarea functions. In iron-autogrow-textarea it autogrows when a string with no spaces is too long.