Make pub Encoding, Encoding::decode and change::get_change_contents

Dependencies

• [2] RVAH6PXA Getting libpijul to compile to WASM32
• [3] I24UEJQL Various post-fire fixes
• [4] VO5OQW4W Removing anyhow in libpijul
• [5] 5FI6SBEZ Re-implement change printing and parsing
• [6] AF5AKUTO Cleanup after the text changes refactoring
• [7] UN2M77YU Test new changes against the old code. Fix several small bugs.
• [8] 4DNDMC7I Fixing a number of bugs related to encodings (extra newlines + misdetection in linux2x)
• [9] IACED7RW text_encoding module
• [10] ZRUPLBBT Colours in diff and change: separating concerns and dependencies
• [*] SXEYMYF7 Fixing the bad changes in history (unfortunately, by rebooting).
• [*] RRCSHAYZ Formatting

Change contents

• replacement in libpijul/src/text_encoding.rs at line 22
  [2.157]→[3.23:93](∅→∅),[3.424]→[3.23:93](∅→∅)
  − pub(crate) fn decode<'a>(&self, text: &'a [u8]) -> Cow<'a, str> {
  [2.157]

  [3.93]
  + pub fn decode<'a>(&self, text: &'a [u8]) -> Cow<'a, str> {
• edit in libpijul/src/lib.rs at line 76
  [12.720352]

  [13.2877]
  + pub use crate::text_encoding::Encoding;
• replacement in libpijul/src/change.rs at line 22
  [2.1537]→[3.88785:88853](∅→∅),[3.10127]→[3.88785:88853](∅→∅),[3.36136]→[3.88785:88853](∅→∅)
  − pub use text_changes::{TextDeError, TextSerError, WriteChangeLine};
  [2.1537]

  [3.36136]
  + pub use text_changes::{get_change_contents, TextDeError, TextSerError, WriteChangeLine};