Fix bug

src/cli/self_update/windows.rs

@@ -595,11 +595,11 @@ fn _remove_from_path(old_path: String, path_str: String) -> Option<String> {
     // for that to find the string, because if it's the last string in the path,
     // there may not be.
     let mut len = path_str.len();
-    if old_path.chars().collect::<Vec<char>>()[idx + path_str.len() - 1] == ';' {
+    if old_path.as_bytes().get(idx + path_str.len()) == Some(&b';') {
         len += 1;
     }
 
-    let mut new_path = old_path[..idx].to_string();
+    let mut new_path = old_path[..idx].to_owned();
     new_path += &old_path[idx + len..];
     // Don't leave a trailing ; though, we don't want an empty string in the
     // path.