[PATCH v3 0/8] Highlight interesting parts of diff

Reading diff output is sometimes very hard, even if it's colored, especially if lines differ only in few characters. This is often true when a commit fixes a typo or renames some variables or functions.

This patch series teaches gitweb to highlight fragments that are different between old and new line. This should mimic the same feature in Trac or GitHub.

Changes since v2:

* Added first patch (gitweb: Use descriptive names in esc_html_hl_regions())
  suggested by Jakub.

* Squashed patches (gitweb: Move HTML-formatting diff line back to
  process_diff_line()) and (gitweb: Push formatting diff lines to
  print_diff_chunk())

* Reauthored patch (gitweb: Pass esc_html_hl_regions() options to esc_html())
  to Jakub.

* Fixed typos in commit messages and added comments based on Jakub's review.

* Added Acked-by from Jakub.

* Fixed minor issues in code pointed by Jakub (hopefully all; I had to drop
  few due to overlong lines etc).

* Renamed format_rem_add_line() to format_rem_add_lines_pair().

* Renamed $prefix_is_space and $suffix_is_space to $prefix_has_nonspace and
  $suffix_has_nonspace and simplified a condition

* Moved untabify() and chomp() back to format_diff_line() and introduced in
  format_rem_add_lines_pair().

* Made red and green background a bit brighter.

Jakub Narębski (1):
  gitweb: Pass esc_html_hl_regions() options to esc_html()

Michał Kiedrowicz (7):
  gitweb: Use descriptive names in esc_html_hl_regions()
  gitweb: esc_html_hl_regions(): Don't create empty <span> elements
  gitweb: Extract print_sidebyside_diff_lines()
  gitweb: Use print_diff_chunk() for both side-by-side and inline diffs
  gitweb: Push formatting diff lines to print_diff_chunk()
  gitweb: Highlight interesting parts of diff
  gitweb: Refinement highlightning in combined diffs

 gitweb/gitweb.perl       |  319 +++++++++++++++++++++++++++++++++-------------
 gitweb/static/gitweb.css |    8 +
 2 files changed, 241 insertions(+), 86 deletions(-)