fix -P option description formatting in mw.1

mw.1

@@ -70,6 +70,7 @@ SMTP server port (assumed to be 465 if not specified)
 .TP
 .B -x
 Account password. You will be prompted for the password interactively if this option is not given.
+.TP
 .B -P
 Pass Prefix. The password will be stored using pass at <passprefix><email>
 .SH OTHER OPTIONS