Fix assertion error when a drive letter path is passed to command line

Author: rhysd

src/bin/edit/main.rs

@@ -250,7 +250,8 @@ fn handle_args(state: &mut State) -> apperr::Result<bool> {
             break;
         }
         let p = cwd.join(Path::new(&arg));
-        let p = path::normalize(&p);
+        // `p` is not absolute when `arg` is a drive letter path like `C:`
+        let p = if p.is_absolute() { path::normalize(&p) } else { p };
         if !p.is_dir() {
             paths.push(p);
         }