Fixes the `contentSize` to never be higher than the `bounds` when there is only 1 line of content. This helps avoiding unnecessary scrolling in the text view when setting for larger and smaller font sizes.
Fixes the `contentSize` to never be higher than the `bounds` when there is only 1 line of content.
This helps avoiding unnecessary scrolling in the text view when setting for larger and smaller font sizes.

slackhq/SlackTextViewController,slackhq/SlackTextViewController,kobim/SlackTextViewController,kobim/SlackTextViewController