`vim-misc` breaks c-x c-f with low `updatetime`.

[dimatura]

Hi, I'm using vim-misc as a dependency for vim-notes, which is a really great plugin. However, recently I've noticed an annoyance: I can't use the filename omnicompletion (mapped by default to c-x c-f) when vim-misc is enabled. It seemed like I could never trigger c-x c-f, only c-x (insert), unless I was really fast. After some investigation I found this probably has to do with updatetime and CursorHoldI. I had set updatetime in my .vimrc to a pretty low value, 200. After letting it go to the default value (4000) c-x c-f works normally. I don't know if this is something that is avoidable with vim-misc, but if it's not, maybe it should be documented somewhere.