Merge branch 'mk/gitweb-diff-hl'

"gitweb" learns to highlight the patch it outputs even more. By Michał Kiedrowicz (7) and Jakub Narębski (1) * mk/gitweb-diff-hl: gitweb: Refinement highlightning in combined diffs gitweb: Highlight interesting parts of diff gitweb: Push formatting diff lines to print_diff_chunk() gitweb: Use print_diff_chunk() for both side-by-side and inline diffs gitweb: Extract print_sidebyside_diff_lines() gitweb: Pass esc_html_hl_regions() options to esc_html() gitweb: esc_html_hl_regions(): Don't create empty <span> elements gitweb: Use descriptive names in esc_html_hl_regions()