Two definitions for local function variables

Nadie ha tomado este issue todavía.

### How are you using the lua-language-server?

NeoVim

### Which OS are you using?

Linux

### What is the issue affecting?

Other

### Expected Behaviour

Using vim.lsp.buf.definition() to go to the definition of a local function variable (assigned with the `=` operator), should give only a single definition at the local variable name.

### Actual Behaviour

Using vim.lsp.buf.definition() to go to the definition of a local function variable (assigned with the `=` operator), gives two definitions on the same line. One is located at the variable name and the other is located at the beginning of the function key word.

### Reproduction steps

1. Create a lua file with the following content:
```lua
local m = function() print "hello world" end

m()
```
2. Move the cursor on the `m()` function call
3. Execute the neovim command `:lua vim.lsp.buf.definition()`

### Additional Notes

_No response_

### Log File

```
[DEBUG][2023-12-16 17:31:59] .../lua/vim/lsp.lua:1391 "LSP[lua_ls]" "client.request" 1 "textDocument/definition" { position = { character = 0, line = 2 }, textDocument = { uri = "file:///home/tobias/.config/nvim/test.lua" }} 147
[DEBUG][2023-12-16 17:31:59] .../vim/lsp/rpc.lua:284 "rpc.send" { id = 1559, jsonrpc = "2.0", method = "textDocument/definition", params = { position = { character = 0, line = 2 }, textDocument = { uri = "file:///home/tobias/.config/nvim/test.lua" } }}
[DEBUG][2023-12-16 17:31:59] .../vim/lsp/rpc.lua:387 "rpc.receive" { id = 1559, jsonrpc = "2.0", result = { { originSelectionRange = { ["end"] = { character = 1, line = 2 }, start = { character = 0, line = 2 } }, targetRange = { ["end"] = { character = 7, line = 0 }, start = { character = 6, line = 0 } }, targetSelectionRange = { ["end"] = { character = 7, line = 0 }, start = { character = 6, line = 0 } }, targetUri = "file:///home/tobias/.config/nvim/test.lua" }, { originSelectionRange = { ["end"] = { character = 1, line = 2 }, start = { character = 0, line = 2 } }, targetRange = { ["end"] = { character = 44, line = 0 }, start = { character = 10, line = 0 } }, targetSelectionRange = { ["end"] = { character = 44, line = 0 }, start = { character = 10, line = 0 } }, targetUri = "file:///home/tobias/.config/nvim/test.lua" } }}
[DEBUG][2023-12-16 17:32:02] .../lua/vim/lsp.lua:1391 "LSP[lua_ls]" "client.request" 1 "textDocument/codeLens" { textDocument = { uri = "file:///home/tobias/.config/nvim/test.lua" }} 147
[DEBUG][2023-12-16 17:32:02] .../vim/lsp/rpc.lua:284 "rpc.send" { id = 1560, jsonrpc = "2.0", method = "textDocument/codeLens", params = { textDocument = { uri = "file:///home/tobias/.config/nvim/test.lua" } }}
[DEBUG][2023-12-16 17:32:02] .../vim/lsp/rpc.lua:387 "rpc.receive" { id = 1560, jsonrpc = "2.0"}
[DEBUG][2023-12-16 17:32:02] .../lua/vim/lsp.lua:1391 "LSP[lua_ls]" "client.request" 1 "textDocument/documentHighlight" { position = { character = 0, line = 2 }, textDocument = { uri = "file:///home/tobias/.config/nvim/test.lua" }} 147
[DEBUG][2023-12-16 17:32:02] .../vim/lsp/rpc.lua:284 "rpc.send" { id = 1561, jsonrpc = "2.0", method = "textDocument/documentHighlight", params = { position = { character = 0, line = 2 }, textDocument = { uri = "file:///home/tobias/.config/nvim/test.lua" } }}
[DEBUG][2023-12-16 17:32:02] .../vim/lsp/rpc.lua:387 "rpc.receive" { id = 1561, jsonrpc = "2.0", result = { { kind = 3, range = { ["end"] = { character = 7, line = 0 }, start = { character = 6, line = 0 } } }, { kind = 2, range = { ["end"] = { character = 1, line = 2 }, start = { character = 0, line = 2 } } } }}
[TRACE][2023-12-16 17:32:02] ...lsp/handlers.lua:618 "default_handler" "textDocument/documentHighlight" { ctx = '{\n bufnr = 147,\n client_id = 1,\n method = "textDocument/documentHighlight",\n params = {\n position = {\n character = 0,\n line = 2\n },\n textDocument = {\n uri = "file:///home/tobias/.config/nvim/test.lua"\n }\n }\n}', result = { { kind = 3, range = { ["end"] = { character = 7, line = 0 }, start = { character = 6, line = 0 } } }, { kind = 2, range = { ["end"] = { character = 1, line = 2 }, start = { character = 0, line = 2 } } } }}

```

Comienza en el punto de entrada textDocument/definition y reproduce el informe con el fragmento de Lua del issue usando vim.lsp.buf.definition() de Neovim. Rastrea por qué la asignación de la función local produce rangos tanto para el nombre de la variable como para la palabra clave function; el trabajo estará terminado cuando la solicitud devuelva únicamente la definición de la variable local.

Escrito por el modelo de indexación a partir del texto del issue.