nohup, remove, tr: also gettextize the alternative messages

src/nohup.c

@@ -162,8 +162,8 @@ main (int argc, char **argv)
       umask (umask_value);
       error (0, 0,
 	     _(ignoring_input
-	       ? "ignoring input and appending output to %s"
-	       : "appending output to %s"),
+	       ? N_("ignoring input and appending output to %s")
+	       : N_("appending output to %s")),
 	     quote (file));
       free (in_home);
     }
@@ -185,8 +185,8 @@ main (int argc, char **argv)
       if (!redirecting_stdout)
 	error (0, 0,
 	       _(ignoring_input
-		 ? "ignoring input and redirecting stderr to stdout"
-		 : "redirecting stderr to stdout"));
+		 ? N_("ignoring input and redirecting stderr to stdout")
+		 : N_("redirecting stderr to stdout")));
 
       if (dup2 (out_fd, STDERR_FILENO) < 0)
 	error (NOHUP_FAILURE, errno, _("failed to redirect standard error"));

src/remove.c

@@ -1541,8 +1541,8 @@ rm_1 (Dirstack_state *ds, char const *filename,
   if (dot_or_dotdot (base))
     {
       error (0, 0, _(base == filename
-		     ? "cannot remove directory %s"
-		     : "cannot remove %s directory %s"),
+		     ? N_("cannot remove directory %s")
+		     : N_("cannot remove %s directory %s")),
 	     quote_n (0, base), quote_n (1, filename));
       return RM_ERROR;
     }

src/tr.c

@@ -1720,9 +1720,9 @@ main (int argc, char **argv)
 	  error (0, 0, _("missing operand after %s"), quote (argv[argc - 1]));
 	  fprintf (stderr, "%s\n",
 		   _(squeeze_repeats
-		     ? ("Two strings must be given when "
-			"both deleting and squeezing repeats.")
-		     : "Two strings must be given when translating."));
+		     ? N_("Two strings must be given when "
+			  "both deleting and squeezing repeats.")
+		     : N_("Two strings must be given when translating.")));
 	}
       usage (EXIT_FAILURE);
     }