Refactored OptionsResolver docs to have a better example
Added missing options.
Deleted checked from options
Added more newlines at end of file.
Deleted precision duplication from number.rst
[#2427] Fixing syntax error
Adding to the controllers as services cookbook
Changing controllers as services with annotations ot a tip
Missing constant colon
[#2538] Proofreading and minor tweaks to updates to controllers as services
[#2538][#2433] Adding a note to the service container chapter about how a controller can be defined as a service
[#2433][#457] Adding more emphasis to the note about controllers as services in the controllers chapter
[#2538] Enhancing advantages of a controller as a service
Merge pull request #2547 from WouterJ/refactor_optionsresolver

Refactored OptionsResolver docs to have a better example
[#2547] Proofreading nice changes by @WouterJ to the OptionsResolver component
Merge branch '2.1' into 2.2
Merge branch '2.2' into 2.3
each() iterates over items as Crawlers
[#2638] Adding versionadded and type-hints to make Closure argument even more obvious