From aa273e3741bb0576d423a5d86461597f97185e42 Mon Sep 17 00:00:00 2001
From: Daniil Leontev <d@leontev.net>
Date: Sun, 30 Mar 2025 16:11:59 +0200
Subject: [PATCH] fix: return empty response to textDocument/formatting if no
 changes

Do not send "edits" if the content remains unchanged after LSP
formatting. Otherwise, Neovim reports an unsaved buffer even when no
actual changes were made
---
 changelog.md               | 1 +
 script/core/formatting.lua | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/changelog.md b/changelog.md
index 7c92fd523..893eaaf8b 100644
--- a/changelog.md
+++ b/changelog.md
@@ -2,6 +2,7 @@
 
 ## Unreleased
 <!-- Add all new changes here. They will be moved under a version at release -->
+* `FIX` prevent unnecessary edits by LSP formatting when content did not change
 
 ## 3.13.9
 `2025-3-13`
diff --git a/script/core/formatting.lua b/script/core/formatting.lua
index de7f30ed9..d9fcf4444 100644
--- a/script/core/formatting.lua
+++ b/script/core/formatting.lua
@@ -21,6 +21,10 @@ return function(uri, options)
         return
     end
 
+    if text == formattedText then
+        return
+    end
+
     return {
         {
             start = state.ast.start,