Allow path::normalize to normalize relative paths

Author: rhysd

src/path.rs

@@ -7,10 +7,7 @@ use std::ffi::OsStr;
 use std::path::{Component, MAIN_SEPARATOR_STR, Path, PathBuf};
 
 /// Normalizes a given path by removing redundant components.
-/// The given path must be absolute (e.g. by joining it with the current working directory).
 pub fn normalize(path: &Path) -> PathBuf {
-    debug_assert!(path.is_absolute());
-
     let mut res = PathBuf::with_capacity(path.as_os_str().len());
     let mut root_len = 0;