Improve guard so it works for no eof new line

indent/plantuml.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'plantuml') == -1
+
 scriptencoding utf-8
 " Vim indent file
 " Language:     PlantUML
@@ -84,4 +85,5 @@ function! s:getIncIndent() abort
         \ '^\s*skinparam\>.*{\s*$\|' .
         \ s:typeKeywordIncPattern()
 endfunction
+
 endif