improv(api): <Plug>(leap-cross-window) -> <Plug>(leap-from-window)

The former is deprecated, as the name is imprecise/misleading.

README.md

@@ -374,9 +374,11 @@ the target labeled, first with blue, and then, after one more `<space>`, green.
 
 ### Cross-window motions
 
-`gs` searches in all the other windows on the tab page. In this case, the
-matches are sorted by their screen distance from the cursor, advancing in
-concentric circles.
+In this case, the matches are sorted by their screen distance from the cursor,
+advancing in concentric circles. The one default motion that works this way is
+`gs` (`<Plug>(leap-from-window)`), searching in all other windows on the tab
+page. To create custom motions like this, e.g. bidirectional search in the
+current window, see [Extending Leap](#extending-leap).
 
 ### Visual and Operator-pending mode
 

doc/leap.txt

@@ -39,11 +39,6 @@ USAGE                                                               *leap-usage*
 - Else: select a label. In case of multiple groups, first switch to the desired
   one, using `<space>` (step back with `<tab>`, if needed).
 
-                                                             *leap-cross-window*
-`gs` searches in all the other windows on the tab page. In this case, the
-matches are sorted by their screen distance from the cursor, advancing in
-concentric circles.
-
                                    *leap-visual-mode* *leap-operator-pending-mode*
 In Visual and Operator-pending mode, there are two different pairs of
 directional motions available, providing the necessary additional comfort and
@@ -334,7 +329,7 @@ default mapping: `S`
 arguments: `{ backward = true, offset = 2 }`
 default mapping: `X` (Visual and Operator-pending mode only)
 
-*<Plug>(leap-cross-window)*
+*<Plug>(leap-from-window)*
 arguments: `{ target_windows = require('leap.util').get_enterable_windows() }`
 default mapping: `gs`
 

fnl/leap/user.fnl

@@ -7,7 +7,9 @@
            [[:n :x :o] "S"  "<Plug>(leap-backward-to)" "Leap backward to"]
            [   [:x :o] "x"  "<Plug>(leap-forward-till)" "Leap forward till"]
            [   [:x :o] "X"  "<Plug>(leap-backward-till)" "Leap backward till"]
-           [[:n :x :o] "gs" "<Plug>(leap-cross-window)" "Leap cross window"]])]
+           [[:n :x :o] "gs" "<Plug>(leap-from-window)" "Leap from window"]
+           [[:n :x :o] "gs" "<Plug>(leap-cross-window)" "Leap from window"]  ; deprecated
+           ])]
     (each [_ mode (ipairs modes)]
       (when (or force?
                 ; Otherwise only set the keymaps if: