refactor: minor updates on pr feedback

src/formatting.rs

@@ -9,7 +9,7 @@ use std::time::{Duration, Instant};
 
 use syntax::ast;
 use syntax::errors::emitter::{ColorConfig, Emitter, EmitterWriter};
-use syntax::errors::{DiagnosticBuilder, Handler, HandlerFlags};
+use syntax::errors::{DiagnosticBuilder, Handler};
 use syntax::parse::{self, ParseSess};
 use syntax::source_map::{FilePathMapping, SourceMap, Span, DUMMY_SP};
 
@@ -81,7 +81,7 @@ fn format_project<T: FormatHandler>(
     let mut parse_session = make_parse_sess(
         source_map.clone(),
         config,
-        ignore_path_set.clone(),
+        Rc::clone(&ignore_path_set),
         can_reset.clone(),
     );
     let mut report = FormatReport::new();
@@ -774,18 +774,11 @@ fn make_parse_sess(
             has_non_ignorable_parser_errors: false,
             can_reset: false,
             ignore_path_set: ignore_path_set,
-            source_map: source_map.clone(),
+            source_map: Rc::clone(&source_map),
             emitter: emitter_writer,
             parser_error_resetter,
         });
-        Handler::with_emitter_and_flags(
-            emitter,
-            HandlerFlags {
-                can_emit_warnings: false,
-                treat_err_as_bug: None,
-                ..Default::default()
-            },
-        )
+        Handler::with_emitter(true, None, emitter)
     };
 
     ParseSess::with_span_handler(tty_handler, source_map)