lynx-dev doc update

[Laura Eaves]

Here are the relevant additions to follow_help.html describing the
+/- suffix feature.
The syntax is awkward and could be changed with a little effort.
Suggestions are welcome.
--le

Index: follow_help.html
--- old/follow_help.html        Mon Jul  7 03:16:14 1997
+++ lynx_help/keystrokes/follow_help.html       Sat Feb 27 15:28:01 1999
@@ -43,6 +43,18 @@
 <em>Follow link (or goto link or page) number:</em> feature to an advanced
 navigation aid.
 
+<p>Finally, a user may add a <em>+</em> or <em>-</em> suffix to a number
+command just before the g or p suffix to indicate jumping forward or back
+a specified number of links or pages.  For example,
+typing <em>1+g</em> followed by RETURN will move the current
+link to the next numbered link, skipping any intervening
+pages or unnumbered links.  <em>1-g</em> goes to the preceeding
+numbered link.  <em>5+p</em> skips ahead 5 pages, and so on.
+Note that typing 1+g is different from typing a down arrow
+in that <em>1+g</em> may skip pages containing no links, or
+intervening non-numbered links, such as form fields when
+form fields are not numbered.
+
 <p>If the user has set <em>Keypad mode</em> to <em>Numbers act as arrows</em>,
 then only '<em>0</em>', rather than every number, will be treated as an
 <em>F_LINK_NUM</em> command for invoking the <em>Follow link (or goto link or 
page)
@@ -74,6 +86,11 @@
 conjunction with the '<em>p</em>' suffix), a <em>page</em> is defined as
 the number of OPTIONs displayed within the vertical dimension of the popup
 window.
+Finally, the <em>+</em> and <em>-</em> suffixes can be used inside popup
+menus to move from option to option or page to page within the popup window
+similarly to the way they are used fro links   For example,
+while viewing a popup window, the user can type 3+p to skip ahead 3 pages,
+or 5-g to back up 5 options.
 
 <p>Note that HTML can be structured so that it includes <em>hidden
 links</em>, i.e., without a visible link name intended for ACTIVATE-ing
@@ -113,7 +130,7 @@
 ACTIVATE-ed via that menu.  Also, if a link was hidden due to an ALT
 attribute in an IMG element, it will be converted to a <em>visible link</em>
 whenever the IMAGE_TOGGLE ('<em>*</em>') command is used to create links
-for SRC attritute values of IMG elements, because this indicates that the
+for SRC attribute values of IMG elements, because this indicates that the
 user does have some form of image handling enabled via a helper application, 
 or wishes to download files for subsequent use with a graphic browsers or
 other suitable software.