[PATCH v2 0/8] gitweb: Highlight interesting parts of diff

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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 v1:

* Rebased on origin/master.

* Added two patches at the beginning of the series.  First one is a small fix
  and second one adds a feature to esc_html_hl_regions() that will be needed
  by later patches.

* Squashed patch "gitweb: Format diff lines just before printing" and reworked
  changes to format_diff_line().  Now it accepts both raw line that needs to be
  html_esc()'ed and already escaped line.

* Squashed changes in CSS with previous patch as proposed by Jakub.

* Dropped esc_html_mark_change() and started using esc_html_hl_regions()
  because it was merged to origin/master.

* Fixed highlightning for combined diffs with more than two parents.

* Fixed indentation (tabs -> spaces) in conditions.

* Ensured that patches with "\ No newline at end of file" are properly

* Ensured that binary patches are not supported in HTML format, thus this
  series canot break it :) (answering Jakub's questions) 

* Reworded some commit messages and fixed typos.

* Renamed few variables after comments from Jakub.

* Added some comments to the code.

* Added Acked-by from Jakub for few patches.

Michał Kiedrowicz (8):
  gitweb: esc_html_hl_regions(): Don't create empty <span> elements
  gitweb: Pass esc_html_hl_regions() options to esc_html()
  gitweb: Extract print_sidebyside_diff_lines()
  gitweb: Use print_diff_chunk() for both side-by-side and inline diffs
  gitweb: Move HTML-formatting diff line back to process_diff_line()
  gitweb: Push formatting diff lines to print_diff_chunk()
  gitweb: Highlight interesting parts of diff
  gitweb: Refinement highlightning in combined diffs

 gitweb/gitweb.perl       |  299 +++++++++++++++++++++++++++++++++-------------
 gitweb/static/gitweb.css |    8 ++
 2 files changed, 225 insertions(+), 82 deletions(-)


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