Indecisive soft wrap

[andrewstart]

With soft wrap on, if there is a trailing new line character that is just enough to trigger a wrap, each display update it toggles between wrapping (with entirely unwanted scroll bars) and not wrapping. Adding one more character to the line makes it wrap correctly, without scroll bars.

I first saw this behavior with Atom 1.9, it is also currently present in the 1.10 beta.