on the command line i run mvim path/to/file.rb
this results in a screen that looks like this

scrolling, page up, page down don't seem to affect the gray. the only solution appears to be to resize the window.
I suspect this is related to the fact that i'm running an external monitor, as that seems to create various window issues with apps. The initial window opens on the laptop screen.
running high sierra on a touchbar mackbook pro
on the command line i run
mvim path/to/file.rbthis results in a screen that looks like this
scrolling, page up, page down don't seem to affect the gray. the only solution appears to be to resize the window.
I suspect this is related to the fact that i'm running an external monitor, as that seems to create various window issues with apps. The initial window opens on the laptop screen.
running high sierra on a touchbar mackbook pro