Document the new cursor settings

Author: fredizzimo

website/docs/configuration.md

@@ -832,17 +832,17 @@ this happens too often accidentally to you, set this to a higher value like `0.3
 VimScript:
 
 ```vim
-let g:neovide_cursor_animation_length = 0.13
+let g:neovide_cursor_animation_length = 0.150
 ```
 
 Lua:
 
 ```lua
-vim.g.neovide_cursor_animation_length = 0.13
+vim.g.neovide_cursor_animation_length = 0.150
 ```
 
 Setting `g:neovide_cursor_animation_length` determines the time it takes for the cursor to complete
-it's animation in seconds. Set to `0` to disable.
+its animation in seconds. Set to `0` to disable.
 
 #### Animation Trail Size
 
@@ -855,17 +855,20 @@ it's animation in seconds. Set to `0` to disable.
 VimScript:
 
 ```vim
-let g:neovide_cursor_trail_size = 0.8
+let g:neovide_cursor_trail_size = 1.0
 ```
 
 Lua:
 
 ```lua
-vim.g.neovide_cursor_trail_size = 0.8
+vim.g.neovide_cursor_trail_size = 1.0
 ```
 
-Setting `g:neovide_cursor_trail_size` determines how much the trail of the cursor lags behind the
-front edge.
+Range 0.0 to 1.0
+
+Setting `g:neovide_cursor_trail_size` changes how much the back of the cursor trails the front. Set
+to 1.0 to make the front jump to the destination immediately with a maximum trail size. A lower
+value makes a smoother animation, with a shorter trail, but also adds lag.
 
 #### Antialiasing