fix: Visual & Select mode mappings

Currently, Visual mappings are defined using “v”, which according to
`map-table`:

         Mode  | Norm | Ins | Cmd | Vis | Sel | Opr | Term | Lang |
Command        +------+-----+-----+-----+-----+-----+------+------+
[nore]map      | yes  |  -  |  -  | yes | yes | yes |  -   |  -   |
n[nore]map     | yes  |  -  |  -  |  -  |  -  |  -  |  -   |  -   |
[nore]map!     |  -   | yes | yes |  -  |  -  |  -  |  -   |  -   |
i[nore]map     |  -   | yes |  -  |  -  |  -  |  -  |  -   |  -   |
c[nore]map     |  -   |  -  | yes |  -  |  -  |  -  |  -   |  -   |
v[nore]map     |  -   |  -  |  -  | yes | yes |  -  |  -   |  -   | <--
x[nore]map     |  -   |  -  |  -  | yes |  -  |  -  |  -   |  -   | <--
s[nore]map     |  -   |  -  |  -  |  -  | yes |  -  |  -   |  -   |
o[nore]map     |  -   |  -  |  -  |  -  |  -  | yes |  -   |  -   |
t[nore]map     |  -   |  -  |  -  |  -  |  -  |  -  | yes  |  -   |
l[nore]map     |  -   | yes | yes |  -  |  -  |  -  |  -   | yes  |

This means that we define mappings for both the Visual and the Select
mode. This however pollutes the Select mode and violates the intent
behind the mode. Quoting the documentation:

> Users will expect printable characters to replace the selected area.
> Therefore avoid mapping printable characters in Select mode.
:h Select-mode-mapping

Using “x”, we will only map for Visual mode.

doc/bepo-nvim.txt

@@ -43,34 +43,6 @@ only the “window” and “movement” groups of mapping, use this instead of
 The following subsections go into details of exactly what mappings are
 in each group. “Modes” have the same meaning as in the |map-table|.
 
---------------------------------------------------------------------------------
-require("bepo").movement()                                    *bepo.nvim-movement*
-on préserve {hjkl} pour les directions
-
- Modes  Bepo  Qwerty
-    nx  c     h
-    nx  t     j
-    nx  s     k
-    nx  r     l
-    nx  C     H
-    nx  T     J
-    nx  S     K
-    nx  R     L
-    nx  gt    gj
-    nx  gs    gk
-    nx  zT    zt
-    nx  zt    zj
-    nx  zk    zs
-    nx  zs    zk
-    nx  h     t
-    nx  H     T
-    nx  l     c
-    nx  L     C
-    nx  j     r
-    nx  J     R
-    nx  k     s
-    nx  K     S
-
 --------------------------------------------------------------------------------
 require("bepo").tabs()                                            *bepo.nvim-tabs*
 le couple [gb]/[gé] agit sur les tabs
@@ -101,14 +73,42 @@ require("bepo").window()                                        *bepo.nvim-windo
      n  wé    <C-w>t
      n  wÉ    <C-w>T
 
+--------------------------------------------------------------------------------
+require("bepo").movement()                                    *bepo.nvim-movement*
+on préserve {hjkl} pour les directions
+
+ Modes  Bepo  Qwerty
+    nx  c     h
+    nx  t     j
+    nx  s     k
+    nx  r     l
+    nx  C     H
+    nx  T     J
+    nx  S     K
+    nx  R     L
+    nx  gt    gj
+    nx  gs    gk
+    nx  zT    zt
+    nx  zt    zj
+    nx  zk    zs
+    nx  zs    zk
+    nx  h     t
+    nx  H     T
+    nx  l     c
+    nx  L     C
+    nx  j     r
+    nx  J     R
+    nx  k     s
+    nx  K     S
+
 --------------------------------------------------------------------------------
 require("bepo").easy_access()                              *bepo.nvim-easy_access*
 
  Modes  Bepo  Qwerty
      n  «     <
-     v  «     <gv
+     x  «     <gv
      n  »     > 
-     v  »     >gv
+     x  »     >gv
     nx  g,    g;
     nx  g;    g,
     nx  é     w

fnl/bepo.fnl

@@ -22,8 +22,8 @@
   nil)
 
 (fn map-visual [key target]
-  "For normal mode mappings"
-  (vim.api.nvim_set_keymap :v key target {:noremap true})
+  "For visual mode mappings"
+  (vim.api.nvim_set_keymap :x key target {:noremap true})
   nil)
 
 (fn map-normal [key target]
@@ -45,7 +45,7 @@
     "Converts a function to the modes it sets mappings for"
     (match (tostring fun)
       :map-text-object :ox
-      :map-visual :v
+      :map-visual :x
       :map-normal :n
       :map-all :nx
       other (error (.. "Unsupported function " other))))

lua/bepo.lua

@@ -4,7 +4,7 @@ local function map_text_object(key, target)
   return nil
 end
 local function map_visual(key, target)
-  vim.api.nvim_set_keymap("v", key, target, {noremap = true})
+  vim.api.nvim_set_keymap("x", key, target, {noremap = true})
   return nil
 end
 local function map_normal(key, target)

scripts/gen_doc.fnl

@@ -38,9 +38,9 @@
 
 (fn print-mapping-struct [struct]
   (match struct
-    {: bepo : modes : qwerty}
-    (let [qw (if (= ">" qwerty) "> " qwerty)]
-      (print (.. (right-align modes 6) "  " (left-align bepo 4) "  " qw)))
+    {: bepo : modes : qwerty} (let [qw (if (= ">" qwerty) "> " qwerty)]
+                                (print (.. (right-align modes 6) "  "
+                                           (left-align bepo 4) "  " qw)))
     _ (error (.. "Received an invalid struct" (fennel.view struct)))))
 
 (fn print-lua-import [name]