Fix language server content update handler

Author: micahscopes

crates/language-server/src/functionality/handlers.rs

@@ -11,6 +11,7 @@ use async_lsp::{
 use common::InputDb;
 use driver::init_ingot;
 use rustc_hash::FxHashSet;
+use salsa::Setter;
 use url::Url;
 
 use super::{capabilities::server_capabilities, hover::hover_helper};
@@ -294,10 +295,11 @@ pub async fn handle_file_change(
                 }
             };
             if let Ok(url) = url::Url::from_file_path(&path) {
-                backend
+                let file = backend
                     .db
                     .workspace()
-                    .touch(&mut backend.db, url.clone(), Some(contents));
+                    .touch(&mut backend.db, url.clone(), None);
+                file.set_text(&mut backend.db).to(contents);
 
                 // If fe.toml was modified, re-scan the ingot for any new files
                 if is_fe_toml {