Added new tag
Referenced oldest but still maintained version in contributing documentation.
Rewrote Templating Docs
Added documentation about profiler matchers
Removed duplicated stuff
Added docs about immutable dispatcher
Documented htmlPattern option
Unified autoloading
adds docs for idle timeout (see symfony/symfony#8651)
adds api link
Merge pull request #2875 from schmittjoh/patch-2

adds docs for idle timeout (see symfony/symfony#8651)
Updated documentation for PR https://github.com/symfony/symfony/pull/8490
Revert "[#2630] Tweaking language"

This reverts commit fb1089f837927b6f937914e36645b7269a43cd27.
Revert "Added new tag"

This reverts commit 26500fbd282a3f545330dcb56a27152a1473156d.
Merge branch '2.3'
gc_maxlifetime default value

The correct value of parameter gc_maxlifetime is not 14400 but 1440.
"be cause" -> "because"
Fixed typo

Fixed typo [doubled words]
Merge branch '2.2' into 2.3
Merge branch '2.3'