[gtksourceview] (6 commits) Non-fast-forward update to branch wip/search-start-signal

[Sébastien Wilmet <swilmet src gnome org>]

The branch 'wip/search-start-signal' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  7cc855e... Add private search-start signal
  f546227... buffer: split update_syntax/search_highlight()
  f71b5b7... SearchContext: fix object leak on regex search
  d175e3e... region: add add_region() function
  8e5c9e0... SearchContext: fix update_highlight() when called for sever

Commits added to the branch:

  7f62b0e... region: improve doc of intersect()
  9942aec... region: add add_region() and intersect_region()
  bf75f03... Add private search-start signal
  466d4eb... buffer: split update_syntax/search_highlight()
  13d0334... SearchContext: fix object leak on regex search
  bbbb5dc... SearchContext: fix update_highlight() when called for sever