Merge pull request #3142 from danielleontiev/text-document-format-no-changes

fix: return empty response to textDocument/formatting if no changes

Author: sumneko

changelog.md

@@ -2,9 +2,9 @@
 
 ## Unreleased
 <!-- Add all new changes here. They will be moved under a version at release -->
-`2025-3-13`
 * `NEW` `unnecessary-assert` diagnostic warns when asserting values that are always truthy
 * `NEW` locale `es-419`, thanks [Felipe Lema](https://codeberg.org/FelipeLema)
+* `FIX` prevent unnecessary edits by LSP formatting when content did not change
 
 ## 3.13.9
 `2025-3-13`

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,