patch 8.2.3985: error messages are spread out

Problem:    Error messages are spread out.
Solution:   Move more error messages to errors.h.
diff --git a/src/hardcopy.c b/src/hardcopy.c
index 3993f4d..da64e1c 100644
--- a/src/hardcopy.c
+++ b/src/hardcopy.c
@@ -3135,7 +3135,7 @@
 
 	// Not printing to a file: use 'printexpr' to print the file.
 	if (eval_printexpr(prt_ps_file_name, psettings->arguments) == FAIL)
-	    emsg(_("E365: Failed to print PostScript file"));
+	    emsg(_(e_failed_to_print_postscript_file));
 	else
 	    prt_message((char_u *)_("Print job sent."));
     }