a few more clippy lints addressed

Dependencies

• [2] NLGQAH4H Credit and reset relative to current directory instead of the root
• [3] ISQJRA3O Fixing the parsing of zombie resurrection in the change text format
• [4] 3YDPHBAN address non-controversial clippy lints
• [5] GLMOA3PF More edges in "credit"
• [6] I52XSRUH Massive cleanup, and simplification
• [7] OAXTXEAF commands/pushpull: display dependencies of change
• [8] KVBLRDOU Concatenating edits with order conflict resolutions (if relevant), and parsing the text format of the result
• [9] SXEYMYF7 Fixing the bad changes in history (unfortunately, by rebooting).
• [10] IMCZFTIJ Update selection instructions to also mention pushing

Change contents

• replacement in pijul/src/commands/pushpull.rs at line 476
  [4.121713]→[4.121713:121751](∅→∅)
  − writeln!(v, "").unwrap();
  [4.121713]

  [4.121751]
  + writeln!(v).unwrap();
• replacement in pijul/src/commands/credit.rs at line 109
  [4.181672]→[4.181672:181711](∅→∅)
  − write!(self.w, "\n")?;
  [4.181672]

  [4.181711]
  + writeln!(self.w)?;
• replacement in pijul/src/commands/credit.rs at line 111
  [4.181725]→[2.428:463](∅→∅)
  − write!(self.w, "\n")?;
  [4.181725]

  [4.181725]
  + writeln!(self.w)?;
• replacement in libpijul/src/working_copy/memory.rs at line 134
  [4.203215]→[4.203215:203279](∅→∅),[4.203279]→[4.203279:203319](∅→∅)
  − let mut it = file.split('/').filter(|c| !c.is_empty());

  − while let Some(c) = it.next() {
  [4.203215]

  [4.203319]
  + let it = file.split('/').filter(|c| !c.is_empty());

  + for c in it {
• edit in libpijul/src/working_copy/memory.rs at line 232
  [4.206667]→[4.206667:206848](∅→∅)
  − }

  − None => {

  − return Err((crate::Error::FileNotFound {

  − path: file.to_string(),

  − })

  − .into())
• edit in libpijul/src/working_copy/memory.rs at line 233
  [4.206862]

  [4.206862]
  + None => Err((crate::Error::FileNotFound {

  + path: file.to_string(),

  + })

  + .into()),
• replacement in libpijul/src/tests/conflict.rs at line 1610
  [4.409207]→[4.409207:409267](∅→∅)
  − for (n, p) in (&p_alice[1..]).into_iter().enumerate() {
  [4.409207]

  [4.409267]
  + for (n, p) in (&p_alice[1..]).iter().enumerate() {
• replacement in libpijul/src/pristine/sanakirja.rs at line 554
  [4.550246]→[4.550246:550312](∅→∅)
  − self.open_channels.borrow().get(&name).map(|x| x.clone())
  [4.550246]

  [4.550312]
  + self.open_channels.borrow().get(&name).cloned()
• replacement in libpijul/src/pristine/sanakirja.rs at line 581
  [4.551240]→[4.551240:551305](∅→∅)
  − self.open_remotes.borrow().get(&name).map(|x| x.clone())
  [4.551240]

  [4.551305]
  + self.open_remotes.borrow().get(&name).cloned()
• replacement in libpijul/src/pristine/sanakirja.rs at line 726
  [4.556166]→[4.556166:556231](∅→∅)
  − self.open_remotes.borrow().get(&name).map(|x| x.clone())
  [4.556166]

  [4.556231]
  + self.open_remotes.borrow().get(&name).cloned()
• replacement in libpijul/src/pristine/sanakirja.rs at line 736
  [4.556533]→[4.556533:556591](∅→∅)
  − .filter(|(k, _)| *k >= n)

  − .next()
  [4.556533]

  [4.556591]
  + .find(|(k, _)| *k >= n)
• replacement in libpijul/src/pristine/channel_dump.rs at line 397
  [4.665411]→[4.665411:665456](∅→∅)
  − e.flag = e.flag ^ EdgeFlags::PARENT;
  [4.665411]

  [4.665456]
  + e.flag ^= EdgeFlags::PARENT;
• replacement in libpijul/src/change.rs at line 1753
  [4.891869]→[4.891869:891903](∅→∅)
  − writeln!(w, "")?;
  [4.891869]

  [4.891903]
  + writeln!(w)?;
• replacement in libpijul/src/change.rs at line 1764
  [4.892327]→[4.892327:892361](∅→∅)
  − writeln!(w, "")?;
  [4.892327]

  [4.892361]
  + writeln!(w)?;
• replacement in libpijul/src/change.rs at line 1793
  [4.893723]→[4.893723:893757](∅→∅)
  − writeln!(w, "")?;
  [4.893723]

  [4.893757]
  + writeln!(w)?;
• replacement in libpijul/src/change.rs at line 1804
  [4.894129]→[4.894129:894163](∅→∅)
  − writeln!(w, "")?;
  [4.894129]

  [4.894163]
  + writeln!(w)?;
• replacement in libpijul/src/change.rs at line 1815
  [4.894429]→[3.94:128](∅→∅)
  − writeln!(w, "")?;
  [4.894429]

  [4.894486]
  + writeln!(w)?;