### New features

* [#2956](https://github.com/rubocop/rubocop/issues/2956): Prefer `.ruby-version` to `TargetRubyVersion`. ([@pclalv][])
* [#3095](https://github.com/rubocop/rubocop/issues/3095): Add `IndentationWidth` configuration parameter for `Style/AlignParameters` cop. ([@alexdowad][])
* [#3066](https://github.com/rubocop/rubocop/issues/3066): Add new `Style/ImplicitRuntimeError` cop which advises the use of an explicit exception class when raising an error. ([@alexdowad][])
* [#3018](https://github.com/rubocop/rubocop/issues/3018): Add new `Style/EachForSimpleLoop` cop which advises the use of `Integer#times` for simple loops which iterate a fixed number of times. ([@alexdowad][])
* [#2595](https://github.com/rubocop/rubocop/issues/2595): New `compact` style for `Style/SpaceInsideLiteralHashBraces`. ([@alexdowad][])
* [#2927](https://github.com/rubocop/rubocop/issues/2927): Add autocorrect for `Rails/Validation` cop. ([@neodelf][])
* [#3135](https://github.com/rubocop/rubocop/pull/3135): Add new `Rails/OutputSafety` cop. ([@josh][])
* [#3164](https://github.com/rubocop/rubocop/pull/3164): Add [Fastlane](https://fastlane.tools/)'s Fastfile to the default Includes. ([@jules2689][])
* [#3173](https://github.com/rubocop/rubocop/pull/3173): Make `Style/ModuleFunction` configurable with `module_function` and `extend_self` styles. ([@tjwp][])
* [#3105](https://github.com/rubocop/rubocop/issues/3105): Add new `Rails/RequestReferer` cop. ([@giannileggio][])
* [#3200](https://github.com/rubocop/rubocop/pull/3200): Add autocorrect for `Style/EachForSimpleLoop` cop. ([@tejasbubane][])
* [#3058](https://github.com/rubocop/rubocop/issues/3058): Add new `Style/SpaceInsideArrayPercentLiteral` cop. ([@owst][])
* [#3058](https://github.com/rubocop/rubocop/issues/3058): Add new `Style/SpaceInsidePercentLiteralDelimiters` cop. ([@owst][])
* [#3179](https://github.com/rubocop/rubocop/pull/3179): Expose files to support testings Cops using RSpec. ([@tjwp][])
* [#3191](https://github.com/rubocop/rubocop/issues/3191): Allow arbitrary comments after cop names in CommentConfig lines (e.g. rubocop:enable). ([@owst][])
* [#3165](https://github.com/rubocop/rubocop/pull/3165): Add new `Lint/PercentStringArray` cop. ([@owst][])
* [#3165](https://github.com/rubocop/rubocop/pull/3165): Add new `Lint/PercentSymbolArray` cop. ([@owst][])
* [#3177](https://github.com/rubocop/rubocop/pull/3177): Add new `Style/NumericLiteralPrefix` cop. ([@tejasbubane][])
* [#1646](https://github.com/rubocop/rubocop/issues/1646): Add configuration style `indented_relative_to_receiver` for `Style/MultilineMethodCallIndentation`. ([@jonas054][])
* New cop `Lint/ShadowedException` checks for the order which exceptions are rescued to avoid rescuing a less specific exception before a more specific exception. ([@rrosenblum][])
* [#3127](https://github.com/rubocop/rubocop/pull/3127): New cop `Lint/InheritException` checks for error classes inheriting from `Exception`, and instead suggests `RuntimeError` or `StandardError`. ([@drenmi][])
* Add new `Performance/PushSplat` cop. ([@segiddins][])
* [#3089](https://github.com/rubocop/rubocop/issues/3089): Add new `Rails/Exit` cop. ([@sgringwe][])

### Bug fixes

* [#3005](https://github.com/rubocop/rubocop/issues/3005): Symlink protection prevents use of caching in CI context. ([@urbanautomaton][])
* [#3037](https://github.com/rubocop/rubocop/issues/3037): `Style/StringLiterals` understands that a bare '#', not '#@variable' or '#{interpolation}', does not require double quotes. ([@alexdowad][])
* [#2722](https://github.com/rubocop/rubocop/issues/2722): `Style/ExtraSpacing` does not attempt to align an equals sign in an argument list with one in an assignment statement. ([@alexdowad][])
* [#3133](https://github.com/rubocop/rubocop/issues/3133): `Style/MultilineMethodCallBraceLayout` does not register offenses for single-line calls. ([@alexdowad][])
* [#3170](https://github.com/rubocop/rubocop/issues/3170): `Style/MutableConstant` does not infinite-loop when correcting an array with no brackets. ([@alexdowad][])
* [#3150](https://github.com/rubocop/rubocop/issues/3150): Fix auto-correct for Style/MultilineArrayBraceLayout. ([@jspanjers][])
* [#3192](https://github.com/rubocop/rubocop/pull/3192): Fix `Lint/UnusedBlockArgument`'s `IgnoreEmptyBlocks` parameter from being removed from configuration. ([@jfelchner][])
* [#3114](https://github.com/rubocop/rubocop/issues/3114): Fix alignment `end` when auto-correcting `Style/EmptyElse`. ([@rrosenblum][])
* [#3120](https://github.com/rubocop/rubocop/issues/3120): Fix `Lint/UselessAccessModifier` reporting useless access modifiers inside {Class,Module,Struct}.new blocks. ([@owst][])
* [#3125](https://github.com/rubocop/rubocop/issues/3125): Fix `Rails/UniqBeforePluck` to ignore `uniq` with block. ([@tejasbubane][])
* [#3116](https://github.com/rubocop/rubocop/issues/3116): `Style/SpaceAroundKeyword` allows `&.` method calls after `super` and `yield`. ([@segiddins][])
* [#3131](https://github.com/rubocop/rubocop/issues/3131): Fix `Style/ZeroLengthPredicate` to ignore `size` and `length` variables. ([@tejasbubane][])
* [#3146](https://github.com/rubocop/rubocop/pull/3146): Fix `NegatedIf` and `NegatedWhile` to ignore double negations. ([@natalzia-paperless][])
* [#3140](https://github.com/rubocop/rubocop/pull/3140): `Style/FrozenStringLiteralComment` works with file doesn't have any tokens. ([@pocke][])
* [#3154](https://github.com/rubocop/rubocop/issues/3154): Fix handling of `()` in `Style/RedundantParentheses`. ([@lumeet][])
* [#3155](https://github.com/rubocop/rubocop/issues/3155): Fix `Style/SpaceAfterNot` reporting on the `not` keyword. ([@NobodysNightmare][])
* [#3160](https://github.com/rubocop/rubocop/pull/3160): `Style/Lambda` fix whitespacing when auto-correcting unparenthesized arguments. ([@palkan][])
* [#2944](https://github.com/rubocop/rubocop/issues/2944): Don't crash on strings that span multiple lines but only have one pair of delimiters in `Style/StringLiterals`. ([@jonas054][])
* [#3157](https://github.com/rubocop/rubocop/issues/3157): Don't let `LineEndConcatenation` and `UnneededInterpolation` make changes to the same string during auto-correct. ([@jonas054][])
* [#3187](https://github.com/rubocop/rubocop/issues/3187): Let `Style/BlockDelimiters` ignore blocks in *all* method arguments. ([@jonas054][])
* Modify `Style/ParallelAssignment` to use implicit begins when parallel assignment uses a `rescue` modifier and is the only thing in the method. ([@rrosenblum][])
* [#3217](https://github.com/rubocop/rubocop/pull/3217): Fix output of ellipses for multi-line offense ranges in HTML formatter. ([@jonas054][])
* [#3207](https://github.com/rubocop/rubocop/issues/3207): Auto-correct modifier `while`/`until` and `begin`..`end` + `while`/`until` in `Style/InfiniteLoop`. ([@jonas054][])
* [#3202](https://github.com/rubocop/rubocop/issues/3202): Fix `Style/EmptyElse` registering wrong offenses and thus making RuboCop crash. ([@deivid-rodriguez][])
* [#3183](https://github.com/rubocop/rubocop/issues/3183): Ensure `Style/SpaceInsideBlockBraces` reports offenses for multi-line blocks. ([@owst][])
* [#3017](https://github.com/rubocop/rubocop/issues/3017): Fix `Style/StringLiterals` to register offenses on non-ascii strings. ([@deivid-rodriguez][])
* [#3056](https://github.com/rubocop/rubocop/issues/3056): Fix `Style/StringLiterals` to register offenses on non-ascii strings. ([@deivid-rodriguez][])
* [#2986](https://github.com/rubocop/rubocop/issues/2986): Fix `RedundantBlockCall` to not report calls that pass block arguments, or where the block has been overridden. ([@owst][])
* [#3223](https://github.com/rubocop/rubocop/issues/3223): Return can take many arguments. ([@ptarjan][])
* [#3239](https://github.com/rubocop/rubocop/pull/3239): Fix bug with --auto-gen-config and a file that does not exist. ([@meganemura][])
* [#3138](https://github.com/rubocop/rubocop/issues/3138): Fix RuboCop crashing when config file contains utf-8 characters and external encoding is not utf-8. ([@deivid-rodriguez][])
* [#3175](https://github.com/rubocop/rubocop/pull/3175): Generate 'Exclude' list for the cops with configurable enforced style to `.rubocop_todo.yml` if different styles are used. ([@flexoid][])
* [#3231](https://github.com/rubocop/rubocop/pull/3231): Make `Rails/UniqBeforePluck` more conservative. ([@tjwp][])

### Changes

* [#3149](https://github.com/rubocop/rubocop/pull/3149): Make `Style/HashSyntax` configurable to not report hash rocket syntax for symbols ending with ? or ! when using ruby19 style. ([@owst][])
* [#1758](https://github.com/rubocop/rubocop/issues/1758): Let `Style/ClosingParenthesisIndentation` follow `Style/AlignParameters` configuration for method calls. ([@jonas054][])
* [#3224](https://github.com/rubocop/rubocop/issues/3224): Rename `Style/DeprecatedHashMethods` to `Style/PreferredHashMethods`. ([@tejasbubane][])

[@bbatsov]: https://github.com/bbatsov
[@jonas054]: https://github.com/jonas054
[@yujinakayama]: https://github.com/yujinakayama
[@dblock]: https://github.com/dblock
[@nevir]: https://github.com/nevir
[@daviddavis]: https://github.com/daviddavis
[@sds]: https://github.com/sds
[@fancyremarker]: https://github.com/fancyremarker
[@sinisterchipmunk]: https://github.com/sinisterchipmunk
[@vonTronje]: https://github.com/vonTronje
[@agrimm]: https://github.com/agrimm
[@pmenglund]: https://github.com/pmenglund
[@chulkilee]: https://github.com/chulkilee
[@codez]: https://github.com/codez
[@emou]: https://github.com/emou
[@skanev]: http://github.com/skanev
[@claco]: http://github.com/claco
[@rifraf]: http://github.com/rifraf
[@scottmatthewman]: https://github.com/scottmatthewman
[@ma2gedev]: http://github.com/ma2gedev
[@jeremyolliver]: https://github.com/jeremyolliver
[@hannestyden]: https://github.com/hannestyden
[@geniou]: https://github.com/geniou
[@jkogara]: https://github.com/jkogara
[@tmorris-fiksu]: https://github.com/tmorris-fiksu
[@mockdeep]: https://github.com/mockdeep
[@hiroponz]: https://github.com/hiroponz
[@tamird]: https://github.com/tamird
[@fshowalter]: https://github.com/fshowalter
[@cschramm]: https://github.com/cschramm
[@bquorning]: https://github.com/bquorning
[@bcobb]: https://github.com/bcobb
[@irrationalfab]: https://github.com/irrationalfab
[@tommeier]: https://github.com/tommeier
[@sfeldon]: https://github.com/sfeldon
[@biinari]: https://github.com/biinari
[@barunio]: https://github.com/barunio
[@molawson]: https://github.com/molawson
[@wndhydrnt]: https://github.com/wndhydrnt
[@ggilder]: https://github.com/ggilder
[@salbertson]: https://github.com/salbertson
[@camilleldn]: https://github.com/camilleldn
[@mcls]: https://github.com/mcls
[@yous]: https://github.com/yous
[@vrthra]: https://github.com/vrthra
[@SkuliOskarsson]: https://github.com/SkuliOskarsson
[@jspanjers]: https://github.com/jspanjers
[@sch1zo]: https://github.com/sch1zo
[@smangelsdorf]: https://github.com/smangelsdorf
[@mvz]: https://github.com/mvz
[@jfelchner]: https://github.com/jfelchner
[@janraasch]: https://github.com/janraasch
[@jcarbo]: https://github.com/jcarbo
[@oneamtu]: https://github.com/oneamtu
[@toy]: https://github.com/toy
[@Koronen]: https://github.com/Koronen
[@blainesch]: https://github.com/blainesch
[@marxarelli]: https://github.com/marxarelli
[@katieschilling]: https://github.com/katieschilling
[@kakutani]: https://github.com/kakutani
[@rrosenblum]: https://github.com/rrosenblum
[@mattjmcnaughton]: https://github.com/mattjmcnaughton
[@huerlisi]: https://github.com/huerlisi
[@volkert]: https://github.com/volkert
[@lumeet]: https://github.com/lumeet
[@mmozuras]: https://github.com/mmozuras
[@d4rk5eed]: https://github.com/d4rk5eed
[@cshaffer]: https://github.com/cshaffer
[@eitoball]: https://github.com/eitoball
[@iainbeeston]: https://github.com/iainbeeston
[@pimterry]: https://github.com/pimterry
[@palkan]: https://github.com/palkan
[@jdoconnor]: https://github.com/jdoconnor
[@meganemura]: https://github.com/meganemura
[@zvkemp]: https://github.com/zvkemp
[@vassilevsky]: https://github.com/vassilevsky
[@gerry3]: https://github.com/gerry3
[@ypresto]: https://github.com/ypresto
[@clowder]: https://github.com/clowder
[@mudge]: https://github.com/mudge
[@mzp]: https://github.com/mzp
[@bankair]: https://github.com/bankair
[@crimsonknave]: https://github.com/crimsonknave
[@renuo]: https://github.com/renuo
[@sdeframond]: https://github.com/sdeframond
[@til]: https://github.com/til
[@carhartl]: https://github.com/carhartl
[@dylandavidson]: https://github.com/dylandavidson
[@tmr08c]: https://github.com/tmr08c
[@hbd225]: https://github.com/hbd225
[@l8nite]: https://github.com/l8nite
[@sumeet]: https://github.com/sumeet
[@ojab]: https://github.com/ojab
[@chastell]: https://github.com/chastell
[@glasnt]: https://github.com/glasnt
[@crazydog115]: https://github.com/crazydog115
[@RGBD]: https://github.com/RGBD
[@panthomakos]: https://github.com/panthomakos
[@matugm]: https://github.com/matugm
[@m1foley]: https://github.com/m1foley
[@tejasbubane]: https://github.com/tejasbubane
[@bmorrall]: https://github.com/bmorrall
[@fphilipe]: https://github.com/fphilipe
[@gotrevor]: https://github.com/gotrevor
[@awwaiid]: https://github.com/awwaiid
[@segiddins]: https://github.com/segiddins
[@urbanautomaton]: https://github.com/urbanautomaton.com
[@unmanbearpig]: https://github.com/unmanbearpig
[@maxjacobson]: https://github.com/maxjacobson
[@sliuu]: https://github.com/sliuu
[@edmz]: https://github.com/edmz
[@syndbg]: https://github.com/syndbg
[@wli]: https://github.com/wli
[@caseywebdev]: https://github.com/caseywebdev
[@MGerrior]: https://github.com/MGerrior
[@imtayadeway]: https://github.com/imtayadeway
[@mrfoto]: https://github.com/mrfoto
[@karreiro]: https://github.com/karreiro
[@dreyks]: https://github.com/dreyks
[@hmadison]: https://github.com/hmadison
[@miquella]: https://github.com/miquella
[@jhansche]: https://github.com/jhansche
[@cornelius]: https://github.com/cornelius
[@eagletmt]: https://github.com/eagletmt
[@apiology]: https://github.com/apiology
[@alexdowad]: https://github.com/alexdowad
[@minustehbare]: https://github.com/minustehbare
[@tansaku]: https://github.com/tansaku
[@ptrippett]: https://github.com/ptrippett
[@br3nda]: https://github.com/br3nda
[@jujugrrr]: https://github.com/jujugrrr
[@sometimesfood]: https://github.com/sometimesfood
[@cgriego]: https://github.com/cgriego
[@savef]: https://github.com/savef
[@volmer]: https://github.com/volmer
[@domcleal]: https://github.com/domcleal
[@codebeige]: https://github.com/codebeige
[@weh]: https://github.com/weh
[@bfontaine]: https://github.com/bfontaine
[@jawshooah]: https://github.com/jawshooah
[@DNNX]: https://github.com/DNNX
[@mvidner]: https://github.com/mvidner
[@mattparlane]: https://github.com/mattparlane
[@drenmi]: https://github.com/drenmi
[@stormbreakerbg]: https://github.com/stormbreakerbg
[@owst]: https://github.com/owst
[@seikichi]: https://github.com/seikichi
[@madwort]: https://github.com/madwort
[@annih]: https://github.com/annih
[@mmcguinn]: https://github.com/mmcguinn
[@pocke]: https://github.com/pocke
[@prsimp]: https://github.com/prsimp
[@ptarjan]: https://github.com/ptarjan
[@jweir]: https://github.com/jweir
[@Fryguy]: https://github.com/Fryguy
[@mikegee]: https://github.com/mikegee
[@tbrisker]: https://github.com/tbrisker
[@necojackarc]: https://github.com/necojackarc
[@laurelfan]: https://github.com/laurelfan
[@amuino]: https://github.com/amuino
[@dylanahsmith]: https://github.com/dylanahsmith
[@gerrywastaken]: https://github.com/gerrywastaken
[@bolshakov]: https://github.com/bolshakov
[@jastkand]: https://github.com/jastkand
[@graemeboy]: https://github.com/graemeboy
[@akihiro17]: https://github.com/akihiro17
[@magni-]: https://github.com/magni-
[@NobodysNightmare]: https://github.com/NobodysNightmare
[@gylaz]: https://github.com/gylaz
[@tjwp]: https://github.com/tjwp
[@neodelf]: https://github.com/neodelf
[@josh]: https://github.com/josh
[@natalzia-paperless]: https://github.com/natalzia-paperless
[@jules2689]: https://github.com/jules2689
[@giannileggio]: https://github.com/giannileggio
[@deivid-rodriguez]: https://github.com/deivid-rodriguez
[@pclalv]: https://github.com/pclalv
[@flexoid]: https://github.com/flexoid
[@sgringwe]: https://github.com/sgringwe
