Remove extraneous space in --debug-check usage info.

client/mysql.cc

@@ -1345,7 +1345,7 @@ static struct my_option my_long_options[] =
   {"debug", '#', "Output debug log", (uchar**) &default_dbug_option,
    (uchar**) &default_dbug_option, 0, GET_STR, OPT_ARG, 0, 0, 0, 0, 0, 0},
 #endif
-  {"debug-check", OPT_DEBUG_CHECK, "Check memory and open file usage at exit .",
+  {"debug-check", OPT_DEBUG_CHECK, "Check memory and open file usage at exit.",
    (uchar**) &debug_check_flag, (uchar**) &debug_check_flag, 0,
    GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
   {"debug-info", 'T', "Print some debug info at exit.", (uchar**) &debug_info_flag,