[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

martin/build.rs

@@ -1,5 +1,5 @@
+use std::fs;
 use std::path::Path;
-use std::{fs};
 
 use walkdir::WalkDir;
 
@@ -29,7 +29,7 @@ fn copy_file_tree(src: &Path, dst: &Path, exclude_dirs: &[&str]) {
             it.skip_current_dir();
             continue;
         }
-        
+
         // Get the relative path of the entry
         let dst_path = dst.join(
             entry
@@ -41,8 +41,8 @@ fn copy_file_tree(src: &Path, dst: &Path, exclude_dirs: &[&str]) {
         // Tell Cargo to monitor all root level entries for changes
         if dst_path.components().count() == 1 {
             println!("cargo:rerun-if-changed={}", entry.path().display());
-        }        
-        
+        }
+
         if entry.file_type().is_dir() {
             fs::create_dir_all(&dst_path).unwrap_or_else(|e| {
                 panic!(