Reword "non-files" in documentation comments

This goes along with changing `NonFile` to `Untrackable`.

gitoxide-core/src/repository/clean.rs

@@ -190,7 +190,7 @@ pub(crate) mod function {
             match disk_kind {
                 Kind::Untrackable => {
                     if debug {
-                        writeln!(err, "DBG: skipped non-file at '{}'", entry.rela_path).ok();
+                        writeln!(err, "DBG: skipped untrackable entry at '{}'", entry.rela_path).ok();
                     }
                     continue;
                 }

gix-dir/tests/dir/walk.rs

@@ -69,7 +69,7 @@ fn one_top_level_fifo() {
     assert_eq!(
         entries,
         &[entry("top", Untracked, Untrackable),],
-        "Non-files are like normal files, but with a different state"
+        "Untrackable entries are like normal files, but with a different state"
     );
 }
 
@@ -107,7 +107,7 @@ fn fifo_in_traversal() {
             entry("file", Untracked, File),
             entry("top", Untracked, Untrackable),
         ],
-        "Non-files only differ by their disk-kind"
+        "Untrackable entries only differ by their disk-kind"
     );
 }
 

gix-status/src/index_as_worktree_with_renames/mod.rs

@@ -387,7 +387,7 @@ pub(super) mod function {
 
         impl<T, U> gix_dir::walk::Delegate for Delegate<'_, '_, T, U> {
             fn emit(&mut self, entry: EntryRef<'_>, collapsed_directory_status: Option<Status>) -> Action {
-                // Status never shows untracked non-files
+                // Status never shows untracked entries of untrackable type
                 if entry.disk_kind != Some(gix_dir::entry::Kind::Untrackable) {
                     let entry = entry.to_owned();
                     self.tx.send(Event::DirEntry(entry, collapsed_directory_status)).ok();