docs: misc, editorconfig

fix https://github.com/neovim/neovim/issues/36858

runtime/lua/editorconfig.lua

@@ -1,9 +1,24 @@
 --- @brief
---- Nvim supports EditorConfig. When a file is opened, after running |ftplugin|s
---- and |FileType| autocommands, Nvim searches all parent directories of that file
---- for ".editorconfig" files, parses them, and applies any properties that match
---- the opened file. Think of it like 'modeline' for an entire (recursive)
---- directory. For more information see https://editorconfig.org/.
+--- EditorConfig is like 'modeline' for an entire (recursive) directory. When a file is opened,
+--- after running |ftplugin|s and |FileType| autocommands, the EditorConfig feature searches all
+--- parent directories of that file for `.editorconfig` files, parses them, and applies their
+--- properties. For more information see https://editorconfig.org/.
+---
+--- Example `.editorconfig` file:
+--- ```ini
+--- root = true
+---
+--- [*]
+--- charset = utf-8
+--- end_of_line = lf
+--- indent_size = 4
+--- indent_style = space
+--- max_line_length = 42
+--- trim_trailing_whitespace = true
+---
+--- [*.{diff,md}]
+--- trim_trailing_whitespace = false
+--- ```
 
 --- @brief [g:editorconfig]() [b:editorconfig]()
 ---

runtime/lua/vim/_meta/builtin.lua

@@ -94,11 +94,12 @@ function vim.empty_dict() end
 --- @param ...? any
 function vim.rpcnotify(channel, method, ...) end
 
---- Sends a request to {channel} to invoke {method} via |RPC| and blocks until
---- a response is received.
+--- Invokes |RPC| `method` on `channel` and blocks until a response is received.
+---
+--- Note: Msgpack NIL values in the response are represented as |vim.NIL|.
+---
+--- Example: see [nvim_exec_lua()]
 ---
---- Note: NIL values as part of the return value is represented as |vim.NIL|
---- special value
 --- @param channel integer
 --- @param method string
 --- @param ...? any

runtime/lua/vim/lsp/health.lua

@@ -249,7 +249,9 @@ local function check_enabled_configs()
             ipairs(v --[[@as string[] ]])
           do
             if not vim.list_contains(valid_filetypes, filetype) then
-              report_warn(("Unknown filetype '%s'."):format(filetype))
+              report_warn(
+                ("Unknown filetype '%s' (Hint: filename extension != filetype)."):format(filetype)
+              )
             end
           end
         end

runtime/lua/vim/shared.lua

@@ -717,6 +717,7 @@ end
 --- vim.tbl_get({ key = { nested_key = true }}, 'key', 'nested_key') == true
 --- vim.tbl_get({ key = {}}, 'key', 'nested_key') == nil
 --- ```
+---@see |unpack()|
 ---
 ---@param o table Table to index
 ---@param ... any Optional keys (0 or more, variadic) via which to index the table