fix: rm extra line break suffix from diffs

Dependencies

• [2] MJDGPSHG WIP contents diff
• [3] ZVI4AWER woot contents_diff
• [4] HPSOAD4R fix moved tracked file view
• [5] 2SLTGWP6 add change files diffs to-record selection

Change contents

• replacement in inflorescence/src/diff.rs at line 187
  [3.20609]→[3.20609:20660](∅→∅)
  − let mut file_lines = file_content.split('\n');
  [3.20609]

  [3.20660]
  + let mut file_lines = trim_line_break_suffix(file_content).split('\n');
• edit in inflorescence/src/diff.rs at line 211
  [4.8633]

  [4.8633]
  + .map(trim_line_break_suffix)
• replacement in inflorescence/src/diff.rs at line 240
  [3.21057]→[3.21057:21121](∅→∅)
  − let deleted = contents_to_lines(&contents);
  [3.21057]

  [2.8103]
  + let deleted =

  + contents_to_lines(trim_line_break_suffix(&contents));
• replacement in inflorescence/src/diff.rs at line 250
  [2.8343]→[3.21122:21184](∅→∅)
  − let added = contents_to_lines(&contents);
  [2.8343]

  [2.8404]
  + let added =

  + contents_to_lines(trim_line_break_suffix(&contents));
• replacement in inflorescence/src/diff.rs at line 277
  [2.9242]→[3.21272:21409](∅→∅)
  − let added = contents_to_lines(&replacement_contents);

  − let deleted = contents_to_lines(&change_contents);
  [2.9242]

  [2.9377]
  + let added = contents_to_lines(trim_line_break_suffix(

  + &replacement_contents,

  + ));

  + let deleted =

  + contents_to_lines(trim_line_break_suffix(&change_contents));
• edit in inflorescence/src/diff.rs at line 319
  [3.28142]

  [3.28142]
  + }

  +

  + fn trim_line_break_suffix(text: &str) -> &str {

  + trim_suffix(text, '\n')

  + }

  +

  + // This is a nightly-only experimental API. (trim_prefix_suffix https://github.com/rust-lang/rust/issues/142312)

  + fn trim_suffix(text: &str, suffix: char) -> &str {

  + text.strip_suffix(suffix).unwrap_or(text)