pijul diff: Do not ignore the --untracked option in presence of --short.

Dependencies

• [2] NWU66ZIP Untracked files when there are no other changes
• [3] AGTMM5U7 More informative diff --short
• [4] I52XSRUH Massive cleanup, and simplification
• [5] SXEYMYF7 Fixing the bad changes in history (unfortunately, by rebooting).
• [6] OQQ4TGEM Printing modifications only once in pijul diff
• [7] VSTBTRYE Fixing a compilation error
• [8] HSEYMLO2 Adding an untracked change iterator

Change contents

• replacement in pijul/src/commands/diff.rs at line 93
  [2.34]→[2.34:62](∅→∅)
  − if self.short {
  [2.34]

  [2.62]
  + if self.short && self.untracked {
• replacement in pijul/src/commands/diff.rs at line 224
  [3.1899]→[3.1899:1950](∅→∅),[3.1950]→[2.402:469](∅→∅)
  − for path in untracked(&repo, &*txn)? {

  − writeln!(stdout, "U {}", path.to_str().unwrap())?;
  [3.1899]

  [3.5627]
  + if self.untracked {

  + for path in untracked(&repo, &*txn)? {

  + writeln!(stdout, "U {}", path.to_str().unwrap())?;

  + }