cx.background_executor().spawn(...) -> cx.background_spawn(...) (#25103)

Done automatically with

> ast-grep -p '$A.background_executor().spawn($B)' -r
'$A.background_spawn($B)' --update-all --globs "\!crates/gpui"

Followed by:

* `cargo fmt`
* Unexpected need to remove some trailing whitespace.
* Manually adding imports of `gpui::{AppContext as _}` which provides
`background_spawn`
* Added `AppContext as _` to existing use of `AppContext`

Release Notes:

- N/A

crates/repl/src/kernels/native_kernel.rs

@@ -5,7 +5,7 @@ use futures::{
     stream::{SelectAll, StreamExt},
     AsyncBufReadExt as _, SinkExt as _,
 };
-use gpui::{App, Entity, EntityId, Task, Window};
+use gpui::{App, AppContext as _, Entity, EntityId, Task, Window};
 use jupyter_protocol::{
     connection_info::{ConnectionInfo, Transport},
     ExecutionState, JupyterKernelspec, JupyterMessage, JupyterMessageContent, KernelInfoReply,
@@ -211,7 +211,7 @@ impl NativeRunningKernel {
                 futures::channel::mpsc::channel(100);
             let (mut shell_request_tx, mut shell_request_rx) = futures::channel::mpsc::channel(100);
 
-            let routing_task = cx.background_executor().spawn({
+            let routing_task = cx.background_spawn({
                 async move {
                     while let Some(message) = request_rx.next().await {
                         match message.content {
@@ -229,7 +229,7 @@ impl NativeRunningKernel {
                 }
             });
 
-            let shell_task = cx.background_executor().spawn({
+            let shell_task = cx.background_spawn({
                 async move {
                     while let Some(message) = shell_request_rx.next().await {
                         shell_socket.send(message).await.ok();
@@ -240,7 +240,7 @@ impl NativeRunningKernel {
                 }
             });
 
-            let control_task = cx.background_executor().spawn({
+            let control_task = cx.background_spawn({
                 async move {
                     while let Some(message) = control_request_rx.next().await {
                         control_socket.send(message).await.ok();

crates/repl/src/kernels/remote_kernels.rs

@@ -1,5 +1,5 @@
 use futures::{channel::mpsc, SinkExt as _};
-use gpui::{App, Entity, Task, Window};
+use gpui::{App, AppContext as _, Entity, Task, Window};
 use http_client::{AsyncBody, HttpClient, Request};
 use jupyter_protocol::{ExecutionState, JupyterKernelspec, JupyterMessage, KernelInfoReply};
 
@@ -189,7 +189,7 @@ impl RemoteRunningKernel {
             let (request_tx, mut request_rx) =
                 futures::channel::mpsc::channel::<JupyterMessage>(100);
 
-            let routing_task = cx.background_executor().spawn({
+            let routing_task = cx.background_spawn({
                 async move {
                     while let Some(message) = request_rx.next().await {
                         w.send(message).await.ok();