tests: fix vim.kill: use <CR> (#109)

Author: blueyed

spec/spec_helper.rb

@@ -21,7 +21,11 @@
     # More friendly killing.
     # Otherwise profiling information might not be written.
     def vim.kill
-      normal(':qall!')
+      normal(':qall!<CR>')
+
+      Timeout.timeout(5) do
+        sleep 0.1 while server.running?
+      end
     end
 
     plugin_path = File.expand_path('../..', __FILE__)