Neatvi doesn't support parsing flags and it will open the editor immediately,
so we don't actually want this check performed.
--- yash-orig/share/completion/ex	2020-12-10 16:40:05.000000000 +0300
+++ yash/share/completion/ex	2021-05-04 22:12:17.299050403 +0300
@@ -6,10 +6,6 @@
 
 function completion/ex {
 
-	case $("${WORDS[1]}" --version 2>/dev/null) in (VIM*)
-		command -f completion//reexecute vim
-		return
-	esac
 	typeset type="$(uname 2>/dev/null)"
 
 	typeset OPTIONS POSIXOPTIONS ADDOPTIONS ARGOPT PREFIX