Improve guard so it works for no eof new line

syntax/oasis.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'ocaml') == -1
+
 if exists("b:current_syntax")
     finish
 endif
@@ -94,4 +95,5 @@ highlight link oasisString String
 highlight link oasisVersion Number
 
 let b:current_syntax = "oasis"
+
 endif