item action 'T' against covered armor

Using 'i'+menu choice for suit+'T' to try to take off a suit that is
covered by a cloak (or shirt covered by suit and/or cloak) wouldn't
do anything.  It should report that you need to take off the outer
garment first and then not take the chosen item off.

There is probably a simpler fix.  It took me a long time to figure
where things were going wrong and them cobble this together.

A big chunk of the diff for invent.c is just identation, surrounding
a one-line change there.

src/cmd.c

@@ -2032,8 +2032,9 @@ struct ext_func_tab extcmdlist[] = {
     /* internal commands: only used by game core, not available for user */
     { '\0', "clicklook", NULL, doclicklook, INTERNALCMD | MOUSECMD, NULL },
     { '\0', "mouseaction", NULL, domouseaction, INTERNALCMD | MOUSECMD, NULL },
-    { '\0', "altdip", NULL, dip_into, INTERNALCMD, NULL },
     { '\0', "altadjust", NULL, adjust_split, INTERNALCMD, NULL },
+    { '\0', "altdip", NULL, dip_into, INTERNALCMD, NULL },
+    { '\0', "alttakeoff", NULL, ia_dotakeoff, INTERNALCMD, NULL },
     { '\0', "altunwield", NULL, remarm_swapwep, INTERNALCMD, NULL },
     { '\0', (char *) 0, (char *) 0, donull, 0, (char *) 0 } /* sentinel */
 };