refactor EmbeddedRPCSpec to address some problems

neovimhaskell / nvim-hs

Neovim API for Haskell plugins as well as the plugin provider

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Closed osa1 closed 9 years ago

osa1 commented 9 years ago

We should use qa! to terminate the nvim instance, otherwise it's only closing one window.
Use getProcessExitCode instead of a TVar.
Test nvim return code.

@saep have a look, this fixes some bugs. nvim now always terminates, and we test for return value of the process.