Log Message:
textproc/diffr: update to 0.1.5

 - Fix build on 32 bits platforms.
 - Fix macOS pipeline.
 - Highlight trailing whitespaces.
 - trailing whitespace: fix for whitespace-only lines.
 - Improve handling of "\ No newline at end of file" message.
 - diffr: fix bad highlighting. (#59)
 - Tidy code related to --line-numbers.
 - Improve encapsulation of iterator types.
 - line-number: fix parser to allow for multiple - ranges.
 - Add an option to print colorized output as html.
 - Use imperative-style code rather than recursion. (#77)
 - main.rs: improve coloring contrast of white letters