docs #22363

Co-authored by: zeertzjq <zeertzjq@outlook.com>
Co-authored by: Steven Todd McIntyre II <114119064+stmii@users.noreply.github.com>
Co-authored by: nobe4 <nobe4@users.noreply.github.com>

- docs: mention --luadev-mod to run with lua runtime files
  When changing a lua file in the ./runtime folder, a new contributor
  might expect changes to be applied to the built Neovim binary.

runtime/doc/lua.txt

@@ -2970,8 +2970,9 @@ range({spec})                                            *vim.version.range()*
 Lua module: iter                                                    *lua-iter*
 
 
-The *vim.iter* module provides a generic "iterator" interface over tables
-and iterator functions.
+The *vim.iter* module provides a generic interface for working with
+iterables: tables, lists, iterator functions, pair()/ipair()-like
+iterators, and `vim.iter()` objects.
 
 *vim.iter()* wraps its table or function argument into an *Iter* object
 with methods (such as |Iter:filter()| and |Iter:map()|) that transform the