uucore/fs: make function more generic

src/uu/realpath/src/realpath.rs

@@ -274,12 +274,12 @@ fn process_relative(
 ) -> PathBuf {
     if let Some(base) = relative_base {
         if path.starts_with(base) {
-            make_path_relative_to(path.as_path(), relative_to.unwrap_or(base))
+            make_path_relative_to(path, relative_to.unwrap_or(base))
         } else {
             path
         }
     } else if let Some(to) = relative_to {
-        make_path_relative_to(path.as_path(), to)
+        make_path_relative_to(path, to)
     } else {
         path
     }

src/uucore/src/lib/features/fs.rs

@@ -489,7 +489,7 @@ pub fn paths_refer_to_same_file<P: AsRef<Path>>(p1: P, p2: P, dereference: bool)
 }
 
 /// Converts absolute `path` to be relative to absolute `to` path.
-pub fn make_path_relative_to<P: AsRef<Path>>(path: P, to: P) -> PathBuf {
+pub fn make_path_relative_to<P1: AsRef<Path>, P2: AsRef<Path>>(path: P1, to: P2) -> PathBuf {
     let path = path.as_ref();
     let to = to.as_ref();
     let common_prefix_size = path