Revert changes to inline assist indentation logic and prompt (#16403)

This PR reverts #16145 and subsequent changes.

This reverts commit a515442a36.

We still have issues with our approach to indentation in Python
unfortunately, but this feels like a safer equilibrium than where we
were.

Release Notes:

- Returned to our previous prompt for inline assist transformations,
since recent changes were introducing issues.

crates/zed/src/main.rs

@@ -187,12 +187,7 @@ fn init_common(app_state: Arc<AppState>, cx: &mut AppContext) -> Arc<PromptBuild
     );
     snippet_provider::init(cx);
     inline_completion_registry::init(app_state.client.telemetry().clone(), cx);
-    let prompt_builder = assistant::init(
-        app_state.fs.clone(),
-        app_state.client.clone(),
-        stdout_is_a_pty(),
-        cx,
-    );
+    let prompt_builder = assistant::init(app_state.fs.clone(), app_state.client.clone(), cx);
     repl::init(
         app_state.fs.clone(),
         app_state.client.telemetry().clone(),

crates/zed/src/zed.rs

@@ -1018,8 +1018,6 @@ fn open_settings_file(
 
 #[cfg(test)]
 mod tests {
-    use crate::stdout_is_a_pty;
-
     use super::*;
     use anyhow::anyhow;
     use assets::Assets;
@@ -3487,12 +3485,8 @@ mod tests {
                 app_state.fs.clone(),
                 cx,
             );
-            let prompt_builder = assistant::init(
-                app_state.fs.clone(),
-                app_state.client.clone(),
-                stdout_is_a_pty(),
-                cx,
-            );
+            let prompt_builder =
+                assistant::init(app_state.fs.clone(), app_state.client.clone(), cx);
             repl::init(
                 app_state.fs.clone(),
                 app_state.client.telemetry().clone(),