internal: Pretty-print Config in status command

Config can become very big, even for relatively small rust project,
and printing everything on one line makes reading the output in VS Code
harder.

crates/rust-analyzer/src/handlers/request.rs

@@ -119,7 +119,7 @@ pub(crate) fn handle_analyzer_status(
     format_to!(buf, "{}", crate::version());
 
     buf.push_str("\nConfiguration: \n");
-    format_to!(buf, "{:?}", snap.config);
+    format_to!(buf, "{:#?}", snap.config);
 
     Ok(buf)
 }