[PATCH v4 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 v3:

1) gitweb: Use descriptive names in esc_html_hl_regions()

    * Renamed $beg in $begin

2) gitweb: Extract print_sidebyside_diff_lines()

    * Reordered check for !$class

    * Reworded commit message to better (I hope) explain why the conditions
      were changed

    * Dropped a comment '# assume that it is change'

3) gitweb: Use print_diff_chunk() for both side-by-side and inline diffs

    * Added ', and at the end of hunk.' to the commit message

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       |  323 +++++++++++++++++++++++++++++++++-------------
 gitweb/static/gitweb.css |    8 +
 2 files changed, 244 insertions(+), 87 deletions(-)