Address clippy lints

src/display.rs

@@ -309,7 +309,7 @@ fn get_name_percent(
     bar_chart: &str,
     display_data: &DisplayData,
 ) -> (String, String) {
-    if bar_chart != "" {
+    if !bar_chart.is_empty() {
         let percent_size_str = format!("{:.0}%", display_data.percent_size(node) * 100.0);
         let percents = format!("│{} │ {:>4}", bar_chart, percent_size_str);
         let name_and_padding = pad_or_trim_filename(node, indent, display_data);

src/utils/mod.rs

@@ -1,7 +1,6 @@
 use std::cmp::Ordering;
 use std::collections::HashMap;
 use std::collections::HashSet;
-use std::iter::FromIterator;
 use std::path::{Path, PathBuf};
 use std::sync::atomic::AtomicBool;
 
@@ -149,7 +148,10 @@ pub fn get_dir_tree<P: AsRef<Path>>(
     let permissions_flag = AtomicBool::new(false);
     let not_found_flag = AtomicBool::new(false);
 
-    let t2 = HashSet::from_iter(top_level_names.iter().map(|p| p.as_ref().to_path_buf()));
+    let t2 = top_level_names
+        .iter()
+        .map(|p| p.as_ref().to_path_buf())
+        .collect();
 
     let t = create_reader_thread(rx, t2, apparent_size);
     let walk_dir_builder = prepare_walk_dir_builder(top_level_names, limit_filesystem, show_hidden);