keep-changes feature (default) to avoid deleting problematic changes

Dependencies

• [2] 5DVRL6MF Hard-unrecord
• [3] 3M7WBE24 Re-adding anyhow in the tests of libpijul
• [4] I52XSRUH Massive cleanup, and simplification
• [5] B5Z4IMEU Generating Cargo.nix for pijul 1.0.0-alpha.6
• [6] WIORLB47 Version bump
• [7] BT2ZHPY4 Version bumps
• [8] 3YDPHBAN address non-controversial clippy lints
• [9] 5BRU2RRW Cleanup (debugging a crash related to trees/inodes)
• [10] G6YZ7U65 Version bump
• [11] JACZWIJ6 Version bump
• [12] 3S4DR77Z Version updates
• [13] SXEYMYF7 Fixing the bad changes in history (unfortunately, by rebooting).
• [14] NX5I5H53 New published versions
• [15] OCBM7IFE New release: pijul-1.0.0-alpha.8
• [16] XAY4DYRR Version bump
• [17] WI5BS6BS New published versions
• [18] SAGSYAPX Various version bumps
• [19] OUWD436A Version bump

Change contents

• replacement in pijul/src/commands/unrecord.rs at line 87
  [2.1442]→[2.1442:1488](∅→∅)
  − repo.changes.del_change(&h)?;
  [2.1442]

  [2.1488]
  + if cfg!(feature = "keep-changes") {

  + repo.changes.del_change(&h)?;

  + }
• replacement in pijul/Cargo.toml at line 42
  [4.197351]→[4.197351:197365](∅→∅)
  − default = [ ]
  [4.197351]

  [4.197365]
  + keep-changes = []

  + default = [ "keep-changes" ]
• replacement in libpijul/src/tests/unrecord.rs at line 738
  [4.270998]→[4.270998:271041](∅→∅)
  − fn double() -> Result<(), anyhow::Error> {
  [4.270998]

  [4.271041]
  + fn double_test() -> Result<(), anyhow::Error> {
• replacement in libpijul/src/tests/unrecord.rs at line 758
  [3.1015]→[4.140:180](∅→∅),[4.271732]→[4.140:180](∅→∅)
  − writeln!(w, "blabla\nblibli")?;
  [3.1015]

  [4.271772]
  + writeln!(w, "blabla\nblublu")?;
• edit in libpijul/src/tests/unrecord.rs at line 767
  [4.271969]→[3.1016:1074](∅→∅),[3.1074]→[4.181:213](∅→∅),[4.272003]→[4.181:213](∅→∅),[4.213]→[4.272035:272059](∅→∅),[4.272035]→[4.272035:272059](∅→∅)
  − repo.write_file::<_, std::io::Error, _>("file", |w| {

  − writeln!(w, "blabla")?;

  − Ok(())

  − })?;