Fix schema generation

Author: taminomara

tools/schema_json_gen/src/main.rs

@@ -3,7 +3,10 @@ use std::fs;
 
 fn main() {
     let schema = schemars::schema_for!(Emmyrc);
-    let schema_json = serde_json::to_string_pretty(&schema).unwrap();
+    let mut schema_json = serde_json::to_string_pretty(&schema).unwrap();
+    if !schema_json.ends_with('\n') {
+        schema_json.push('\n');
+    }
     let root_crates = std::env::current_dir().unwrap();
     let output_path = root_crates.join("crates/emmylua_code_analysis/resources/schema.json");
     println!("Output path: {:?}", output_path);