`company-backends' is special-variable-p so I don't believe it can be
buffer-local.
avoid eager loading of ess or julia.
if one changes the minimal tested version of emacs, one should `make
README` to reflect. Also, reverted back to 25.1 because #509.
no need for evm under osx (purcell).
restore a completion test (after disabling company-frontends).
Hard to reproduce exactly what is happening, but try to work around the
possibility of a company completion popup appearing in the buffer or minibuffer.
Unfortunately, no good way to test font-lock as font-lock-mode won't
activate under noninteractive ecukes (can try --no-win or --win, but
won't fly under travis)
In practice, polymode font-lock bugs often manifest themselves much as
issue #456 did. The rear-nonsticky property on the input prompt gets
washed away by font-lock and brokenness ensues.
Some users run jupyter via `jupyter-notebook` instead of `jupyter`,
and break because we unilaterally impose the "notebook" subcommand.
Those users can now:
```
M-x customize-group ein
Jupyter Server Use Subcommand: Omit
```
Currently, an org block that has no output (e.g., `foo = 5`) never
clears the `[....]` upon block completion.
Also, no `:session` should default to localhost.
Before: Exit emacs with modified notebooks. Be asked "You have
unsaved notebooks. Discard changes?" Respond no, and manually figure
out which notebooks haven't been saved.
After: Exit emacs with modified notebooks. Be asked "Save A?".
Respond yes. Quit without further ado.
Also, bugfix killing of buffers in polymode. Must kill host buffer,
not indirect buffers.