Fix #684 by putting newline after $argv

It's rather hacky, but it sort of works. (but then, this makes fish
compare to PHP (but PHP doesn't put that newline), so perhaps I
shouldn't do that - http://git.io/GFurbg)

share/functions/eval.fish

@@ -1,4 +1,3 @@
-
 function eval -S -d "Evaluate parameters as a command"
 
 	# If we are in an interactive shell, eval should enable full
@@ -20,7 +19,7 @@ function eval -S -d "Evaluate parameters as a command"
 		status --job-control full
 	end
 
-	echo "begin; $argv ;end eval2_inner <&3 3<&-" | source 3<&0
+	echo "begin; $argv "\n" ;end eval2_inner <&3 3<&-" | source 3<&0
 	set -l res $status
 
 	status --job-control $mode