Fix doubled words
New ANSICON link
Merge pull request #2797 from naitsirch/error_path

Added documentation for errorPath option of UniqueEntity constraint
Fixing bad link
[#2797] Minor tweaks to new UniqueEntity.errorPath docs
Merge branch '2.1' into 2.2
Merge branch '2.2' into 2.3

Conflicts:
	reference/constraints/UniqueEntity.rst
Merge pull request #2762 from DanielleSuurlant/issue-2750

Rewrite validation groups explanation.
Fix typo
Merge pull request #2808 from xabbuh/issue-2802

remove remaining references to the virtual option
Update service_container_parameters.rst
better grammar
a bit of indentation
moving reference from debugging to templating formats to fix problem with note giving wrong link
clarification difference between function and tag includes
update according to stofs comments
[#2813] Tweaks to explaining how variables are passed into included templates and making references to older include tag easier to get more information about
Merge pull request #2816 from Nyholm/patch-1

Missing field in documentation: Added empty_value
EventDispatch implements the Mediator pattern, not the Observer pattern
Merge remote-tracking branch 'origin/2.2' into 2.2