Improve emacs eglot config

Summary: Add a hook to automatically enable it in erlang-mode, and add the missing closing parens.

Reviewed By: lisztspace

Differential Revision: D88264639

fbshipit-source-id: d3d8166dd233ddc59ff6bb082f3c022851aec5dc

website/docs/get-started/editors/emacs.md

@@ -4,17 +4,21 @@ sidebar_position: 2
 
 # Emacs
 
-The ELP project can be used as a [language server](https://microsoft.github.io/language-server-protocol/overviews/lsp/overview/) in the Emacs text editor via the [eglot](https://github.com/joaotavora/eglot) or [lsp-mode](https://emacs-lsp.github.io/lsp-mode/) LSP clients.
+The ELP project can be used as a
+[language server](https://microsoft.github.io/language-server-protocol/overviews/lsp/overview/)
+in the Emacs text editor via the [eglot](https://github.com/joaotavora/eglot) or
+[lsp-mode](https://emacs-lsp.github.io/lsp-mode/) LSP clients.
 
 ## Eglot
 
-Eglot is part of Emacs core since Emacs 29.
-For earlier versions it can be installed with the `eglot` package.
+Eglot is part of Emacs core since Emacs 29. For earlier versions it can be
+installed with the `eglot` package.
 
 ### Configuration
 
 ```elisp
 (use-package eglot
+  :hook ((erlang-mode . eglot-ensure))
 
   :config
   ;; Remove default LSP server
@@ -23,14 +27,19 @@ For earlier versions it can be installed with the `eglot` package.
 
   ;; Enable ELP
   (add-to-list 'eglot-server-programs
-               '(erlang-mode . ("elp" "server"))
+               '(erlang-mode . ("elp" "server"))))
 ```
 
-Refer to the [manual](https://elpa.gnu.org/devel/doc/eglot.html#Customization-Variables) for additional configuration options.
+Refer to the
+[manual](https://elpa.gnu.org/devel/doc/eglot.html#Customization-Variables) for
+additional configuration options.
 
 ## lsp-mode
 
-Install the `lsp-mode` package, which is a generic Emacs client for LSP servers. You can follow [these instructions](https://emacs-lsp.github.io/lsp-mode/page/installation/) to install it.
+Install the `lsp-mode` package, which is a generic Emacs client for LSP servers.
+You can follow
+[these instructions](https://emacs-lsp.github.io/lsp-mode/page/installation/) to
+install it.
 
 ### Configuration
 
@@ -52,15 +61,21 @@ Add the following to your emacs `.emacs` file or equivalent.
   )
 ```
 
-For a list of available configuration option, please refer to [this page](https://emacs-lsp.github.io/lsp-mode/page/lsp-erlang-elp/) and to the [`lsp-mode` settings documentation](https://emacs-lsp.github.io/lsp-mode/page/settings/mode/).
+For a list of available configuration option, please refer to
+[this page](https://emacs-lsp.github.io/lsp-mode/page/lsp-erlang-elp/) and to
+the
+[`lsp-mode` settings documentation](https://emacs-lsp.github.io/lsp-mode/page/settings/mode/).
 
-There is also a [`.dotemacs`](https://github.com/WhatsApp/erlang-language-platform/blob/main/editors/emacs/dotemacs.el) file in the ELP repository that you can use as a reference.
+There is also a
+[`.dotemacs`](https://github.com/WhatsApp/erlang-language-platform/blob/main/editors/emacs/dotemacs.el)
+file in the ELP repository that you can use as a reference.
 
 ## Troubleshooting
 
 #### The following servers support current file but do not have automatic installation
 
-Ensure that the `elp` executable is available in your `PATH` via Emacs. A workaround is:
+Ensure that the `elp` executable is available in your `PATH` via Emacs. A
+workaround is:
 
 ```elisp
 ;; Ensure your Emacs environment looks like your user's shell one