Not updating with trailing newlines in OCaml

[frangio]

When using Codi in OCaml code, trailing newlines will prevent Codi from updating.

Additionally, newlines in the middle of the code result in the last line showing as "Syntax error" while it's being edited, which doesn't happen otherwise.

• Linux 4.14
• Neovim v0.2.2
• script from util-linux 2.32
• OCaml 4.06.0

[metakirby5]

This is due to how OCaml handles newlines. We typically assume there will be one prompt per line of input, but that is not always the case. This can be addressed in a preprocess. I currently don't have time to work on this, but am happy to merge in a fix for it.