Improve guard so it works for no eof new line

syntax/basic/function.vim

@@ -1,4 +1,5 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'typescript') == -1
+
 syntax keyword typescriptAsyncFuncKeyword      async
   \ nextgroup=typescriptFuncKeyword,typescriptArrowFuncDef
   \ skipwhite
@@ -66,4 +67,5 @@ syntax region typescriptParamImpl matchgroup=typescriptParens
   \ contains=typescriptDecorator,@typescriptParameterList,@typescriptComments
   \ nextgroup=typescriptReturnAnnotation,typescriptBlock
   \ contained skipwhite skipnl
+
 endif