Update

indent/gohtmltmpl.vim

@@ -15,6 +15,10 @@ if exists("*GetGoHTMLTmplIndent")
   finish
 endif
 
+" don't spam the user when Vim is started in Vi compatibility mode
+let s:cpo_save = &cpo
+set cpo&vim
+
 function! GetGoHTMLTmplIndent(lnum)
   " Get HTML indent
   if exists('*HtmlIndent')
@@ -45,6 +49,10 @@ function! GetGoHTMLTmplIndent(lnum)
   return ind
 endfunction
 
+" restore Vi compatibility settings
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
 " vim: sw=2 ts=2 et
 
 endif