Fixing a bug with empty new files, and another one with empty replacements

Dependencies

• [2] 65S67T3E Parsing \\ for empty additions (rare problem)
• [3] CUHXXBDZ Fixing a bug in replacements, recently introduced during a fix of a graph corruption bug
• [4] HQ56ADNS Formatting, and version bump
• [5] IYJZVLET Cleaning up the literate programming bits
• [6] BZCGXVS7 Fixing two bugs around conflicts on the last line, where invalid patches were produced (first bug) and applied (second bug)
• [7] SXEYMYF7 Fixing the bad changes in history (unfortunately, by rebooting).
• [8] KVBLRDOU Concatenating edits with order conflict resolutions (if relevant), and parsing the text format of the result
• [9] VO5OQW4W Removing anyhow in libpijul
• [10] 6YMDOZIB Refactoring apply
• [11] CCFJ7VO3 Renaming "Record" to "Hunk" in the changes

Change contents

• replacement in libpijul/src/record.rs at line 291
  [4.497247]→[4.497247:497313](∅→∅)
  − if self.rec.contents.len() as u64 > inode_pos.0 + 1 {
  [4.497247]

  [4.497313]
  + if end > start {
• edit in libpijul/src/diff/replace.rs at line 63
  [4.781789]

  [4.781789]
  + if start >= end {

  + return;

  + }
• edit in libpijul/src/diff/replace.rs at line 75
  [4.45]→[3.119:145](∅→∅),[3.145]→[4.0:20](∅→∅),[4.93]→[4.0:20](∅→∅),[4.20]→[4.112:122](∅→∅),[4.112]→[4.112:122](∅→∅)
  − if start >= end {

  − return;

  − }
• replacement in libpijul/src/change/text_changes.rs at line 810
  [4.68732]→[4.68732:68816](∅→∅),[4.68816]→[2.0:174](∅→∅),[2.174]→[4.68897:69085](∅→∅),[4.68897]→[4.68897:69085](∅→∅)
  − if let Some(Atom::NewVertex(ref mut contents)) = contents {

  − if contents.end > contents.start

  − && contents_[contents.end.0 as usize - 1] == b'\n'

  − {

  − assert_eq!(contents.end.0 as usize, contents_.len());

  − contents_.pop();

  − contents.end.0 -= 1;
  [4.68732]

  [4.69085]
  + if let Some(Atom::NewVertex(mut c)) = contents.take() {

  + if c.end > c.start {

  + if contents_[c.end.0 as usize - 1] == b'\n' {

  + assert_eq!(c.end.0 as usize, contents_.len());

  + contents_.pop();

  + c.end.0 -= 1;

  + }

  + *contents = Some(Atom::NewVertex(c))