vim-patch:8.0.0452: some macros are in lower case (#8505)

Problem:    Some macros are in lower case.
Solution:   Make a few more macros upper case.
1c46544412

src/nvim/fold.c

@@ -1806,7 +1806,7 @@ char_u *get_foldtext(win_T *wp, linenr_T lnum, linenr_T lnume,
     unsigned long count = (unsigned long)(lnume - lnum + 1);
 
     vim_snprintf((char *)buf, FOLD_TEXT_LEN,
-                 ngettext("+--%3ld line folded",
+                 NGETTEXT("+--%3ld line folded",
                           "+--%3ld lines folded ", count),
                  count);
     text = buf;