[PATCH v2 0/3] gitk: save only changed configuration on exit

Changes since v1:

* Add value check to config_variable_change_cb
* Squash 2/3 and 3/3 and the value check into one commit. There is no really
  reasons to divide them except following the real coding history
* Describle the previous undesirable behavior in commit message
* Synchronize writing of config file

Max Kirillov (3):
  gitk refactor: remove boilerplate for configuration variables
  gitk: write only changed configuration variables
  gitk: synchronize config write

 gitk | 215 +++++++++++++++++++++++++++++++++++++++++++------------------------
 1 file changed, 139 insertions(+), 76 deletions(-)