Improve gettext support. Stylistic fixes and error handling fixes while

on it.

grub-core/commands/hashsum.c

@@ -30,7 +30,8 @@ GRUB_MOD_LICENSE ("GPLv3+");
 
 static const struct grub_arg_option options[] = {
   {"hash", 'h', 0, N_("Specify hash to use."), N_("HASH"), ARG_TYPE_STRING},
-  {"check", 'c', 0, N_("Check hash list file."), N_("FILE"), ARG_TYPE_STRING},
+  {"check", 'c', 0, N_("Check hashes of files with hash list FILE."),
+   N_("FILE"), ARG_TYPE_STRING},
   {"prefix", 'p', 0, N_("Base directory for hash list."), N_("DIR"),
    ARG_TYPE_STRING},
   {"keep-going", 'k', 0, N_("Don't stop after first error."), 0, 0},