Updated vim plugins

sources_non_forked/vim-go/autoload/go/fmt_test.vim

@@ -1,3 +1,7 @@
+" don't spam the user when Vim is started in Vi compatibility mode
+let s:cpo_save = &cpo
+set cpo&vim
+
 func! Test_run_fmt() abort
   let actual_file = tempname()
   call writefile(readfile("test-fixtures/fmt/hello.go"), actual_file)
@@ -46,4 +50,8 @@ func! Test_goimports() abort
   call assert_equal(expected, actual)
 endfunc
 
+" restore Vi compatibility settings
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
 " vim: sw=2 ts=2 et