docs: misc #24163

- Also delete old perl scripts which are not used since 8+ years ago.

fix #23251
fix #27367
ref https://github.com/neovim/neovim/issues/2252#issuecomment-1902662577

Helped-by: Daniel Kongsgaard <dakongsgaard@gmail.com>
Co-authored-by: Kevin Pham <keevan.pham@gmail.com>

runtime/lua/vim/_defaults.lua

@@ -255,7 +255,7 @@ do
 
   vim.api.nvim_create_autocmd('TermRequest', {
     group = nvim_terminal_augroup,
-    desc = 'Respond to OSC foreground/background color requests',
+    desc = 'Handles OSC foreground/background color requests',
     callback = function(args)
       --- @type integer
       local channel = vim.bo[args.buf].channel

runtime/lua/vim/_meta/api.lua

@@ -897,8 +897,8 @@ function vim.api.nvim_create_augroup(name, opts) end
 ---             • callback (function|string) optional: Lua function (or
 ---               Vimscript function name, if string) called when the event(s)
 ---               is triggered. Lua callback can return a truthy value (not
----               `false` or `nil`) to delete the autocommand. Receives a
----               table argument with these keys:
+---               `false` or `nil`) to delete the autocommand. Receives one
+---               argument, a table with these keys:              *event-args*
 ---               • id: (number) autocommand id
 ---               • event: (string) name of the triggered event
 ---                 `autocmd-events`
@@ -907,7 +907,7 @@ function vim.api.nvim_create_augroup(name, opts) end
 ---               • buf: (number) expanded value of <abuf>
 ---               • file: (string) expanded value of <afile>
 ---               • data: (any) arbitrary data passed from
----                 `nvim_exec_autocmds()`
+---                 `nvim_exec_autocmds()`                        *event-data*
 ---             • command (string) optional: Vim command to execute on event.
 ---               Cannot be used with {callback}
 ---             • once (boolean) optional: defaults to false. Run the

runtime/lua/vim/_meta/options.lua

@@ -7446,6 +7446,7 @@ vim.bo.vts = vim.bo.vartabstop
 ---
 --- Level   Messages ~
 --- ----------------------------------------------------------------------
+--- 1	Enables Lua tracing (see above). Does not produce messages.
 --- 2	When a file is ":source"'ed, or `shada` file is read or written.
 --- 3	UI info, terminal capabilities.
 --- 4	Shell commands.

runtime/lua/vim/highlight.lua

@@ -1,26 +1,3 @@
----@brief
----
---- Nvim includes a function for highlighting a selection on yank.
----
---- To enable it, add the following to your `init.vim`:
----
---- ```vim
---- au TextYankPost * silent! lua vim.highlight.on_yank()
---- ```
----
---- You can customize the highlight group and the duration of the highlight via:
----
---- ```vim
---- au TextYankPost * silent! lua vim.highlight.on_yank {higroup="IncSearch", timeout=150}
---- ```
----
---- If you want to exclude visual selections from highlighting on yank, use:
----
---- ```vim
---- au TextYankPost * silent! lua vim.highlight.on_yank {on_visual=false}
---- ```
----
-
 local api = vim.api
 
 local M = {}
@@ -97,7 +74,13 @@ local yank_ns = api.nvim_create_namespace('hlyank')
 local yank_timer --- @type uv.uv_timer_t?
 local yank_cancel --- @type fun()?
 
---- Highlight the yanked text
+--- Highlight the yanked text during a |TextYankPost| event.
+---
+--- Add the following to your `init.vim`:
+---
+--- ```vim
+--- autocmd TextYankPost * silent! lua vim.highlight.on_yank {higroup='Visual', timeout=300}
+--- ```
 ---
 --- @param opts table|nil Optional parameters
 ---              - higroup   highlight group for yanked region (default "IncSearch")

runtime/lua/vim/iter.lua

@@ -450,20 +450,24 @@ function Iter:join(delim)
   return table.concat(self:totable(), delim)
 end
 
---- Folds ("reduces") an iterator into a single value.
+--- Folds ("reduces") an iterator into a single value. [Iter:reduce()]()
 ---
 --- Examples:
 ---
 --- ```lua
 --- -- Create a new table with only even values
---- local t = { a = 1, b = 2, c = 3, d = 4 }
---- local it = vim.iter(t)
---- it:filter(function(k, v) return v % 2 == 0 end)
---- it:fold({}, function(t, k, v)
----   t[k] = v
----   return t
---- end)
---- -- { b = 2, d = 4 }
+--- vim.iter({ a = 1, b = 2, c = 3, d = 4 })
+---   :filter(function(k, v) return v % 2 == 0 end)
+---   :fold({}, function(acc, k, v)
+---     acc[k] = v
+---     return acc
+---   end) --> { b = 2, d = 4 }
+---
+--- -- Get the "maximum" item of an iterable.
+--- vim.iter({ -99, -4, 3, 42, 0, 0, 7 })
+---   :fold({}, function(acc, v)
+---     acc.max = math.max(v, acc.max or v) return acc
+---   end) --> { max = 42 }
 --- ```
 ---
 ---@generic A