vim-patch:8.2.1585: messages in globals.h not translated

Problem:    Messages in globals.h not translated, xgettext on MS-Windows not
            fully supported.
Solution:   Add globals.h to list of input files.  Update MS-Windows makefiles
            to improve message translations. (Ken Takata, closes vim/vim#6858)

fa57335e53

Also update gettext() docs to match latest Vim.

src/nvim/po/fixfilenames.vim

@@ -5,7 +5,7 @@ set shortmess+=A
 
 for name in argv()[1:]
   let jsname = fnamemodify(name, ":t:r") .. ".js"
-  exe "%s+" .. jsname .. "+" .. name .. "+"
+  exe "%s+" .. jsname .. "+" .. substitute(name, '\\', '/', 'g') .. "+"
 endfor
 
 write