Guidebook update for #perminv

Interaction with persistent inventory window was documented for
the '|' key a week ago but nothing was specified for '#perminv'.

menu_shift_left and menu_shift_right for X11 are now explicitly
for the perm_invent menu only.

doc/Guidebook.mn

@@ -35,7 +35,7 @@
 .ds vr "NetHack 3.7
 .ds f0 "\*(vr
 .ds f1
-.ds f2 "March 12, 2021
+.ds f2 "March 18, 2021
 .
 .\" A note on some special characters:
 .\" \(lq = left double quote
@@ -1362,6 +1362,14 @@ option to require a response of \f(CRyes\fP instead.
 .lp "#pay     "
 Pay your shopping bill.
 Default key is \(oqp\(cq.
+.lp "#perminv "
+If persistent inventory display is supported and enabled (with the
+.op perm_invent
+option), interact with it instead of with the map.
+You'll be prompted for menu scrolling keystrokes such
+as \(oq\f(CR>\fP\(cq and \(oq\f(CR<\fP\(cq.
+Press \f(CRReturn\fP or \f(CREscape\fP to resume normal play.
+Default key is \(oq|\(cq.
 .lp "#pickup  "
 Pick up things at the current location.
 Default key is \(oq,\(cq.
@@ -3787,15 +3795,15 @@ objects for selection.
 Partial skips the object class filtering and
 immediately displays a menu of all objects.
 .lp menu_deselect_all
-Menu character accelerator to deselect all items in a menu.
+Key to deselect all items in a menu.
 Implemented by the Amiga, Gem, X11 and tty ports.
 Default \(oq\-\(cq.
 .lp menu_deselect_page
-Menu character accelerator to deselect all items on this page of a menu.
+Key to deselect all items on this page of a menu.
 Implemented by the Amiga, Gem and tty ports.
 Default \(oq\\\(cq.
 .lp menu_first_page
-Menu character accelerator to jump to the first page in a menu.
+Key to jump to the first page in a menu.
 Implemented by the Amiga, Gem and tty ports.
 Default \(oq\(ha\(cq.
 .lp menu_headings
@@ -3804,19 +3812,19 @@ Values are \(lqnone\(rq, \(lqbold\(rq, \(lqdim\(rq, \(lqunderline\(rq,
 \(lqblink\(rq, or \(lqinverse\(rq.
 Not all ports can actually display all types.
 .lp menu_invert_all
-Menu character accelerator to invert all items in a menu.
+Key to invert all items in a menu.
 Implemented by the Amiga, Gem, X11 and tty ports.
 Default \(oq@\(cq.
 .lp menu_invert_page
-Menu character accelerator to invert all items on this page of a menu.
+Key to invert all items on this page of a menu.
 Implemented by the Amiga, Gem and tty ports.
 Default \(oq\(ti\(cq. \" ~
 .lp menu_last_page
-Menu character accelerator to jump to the last page in a menu.
+Key to jump to the last page in a menu.
 Implemented by the Amiga, Gem and tty ports.
 Default \(oq|\(cq.
 .lp menu_next_page
-Menu character accelerator to goto the next menu page.
+Key to go to the next menu page.
 Implemented by the Amiga, Gem and tty ports.
 Default \(oq>\(cq.
 .lp menu_objsyms
@@ -3827,34 +3835,34 @@ Do not clear the screen before drawing menus, and align
 menus to the right edge of the screen. Only for the tty port.
 (default on)
 .lp menu_previous_page
-Menu character accelerator to goto the previous menu page.
+Key to go to the previous menu page.
 Implemented by the Amiga, Gem and tty ports.
 Default \(oq<\(cq.
 .lp menu_search
-Menu character accelerator to search for a menu item.
+Key to search for a menu item.
 Implemented by the Amiga, Gem, X11 and tty ports.
 Default \(oq:\(cq.
 .lp menu_select_all
-Menu character accelerator to select all items in a menu.
+Key to select all items in a menu.
 Implemented by the Amiga, Gem, X11 and tty ports.
 Default \(oq.\(cq.
 .lp menu_select_page
-Menu character accelerator to select all items on this page of a menu.
+Key to select all items on this page of a menu.
 Implemented by the Amiga, Gem and tty ports.
 Default \(oq,\(cq.
 .lp menu_shift_left
-Menu character accelerator to scroll a menu\(emone which has been
+Key to scroll a menu\(emone which has been
 scrolled right\(emback to the left.
-Implemented by curses for
+Implemented for
 .op perm_invent
-only and by X11.
+only by curses and X11.
 Default \(oq{\(cq.
 .lp menu_shift_right
-Menu character accelerator to scroll a menu which has text beyond the
+Key to scroll a menu which has text beyond the
 right edge to the right.
-Implemented by curses for
+Implemented for
 .op perm_invent
-only and by X11.
+only by curses and X11.
 Default \(oq}\(cq.
 ." .lp menu_tab_sep
 ." Format menu entries using TAB to separate columns (default off).