* Improve documentation with "Avoid" vs. "Prefer" and "Quick fix" (#403)

* Approach our initial goal

* Approach our template to our current goal

* Tweak all (?) rules' documentation

* Fixes 293: Add rule: No Single Match Maybe (#412)

* elbrujohalcon.293.single_maybe_clause- New Rule: No Single Match Maybe

* elbrujohalcon.293.single_maybe_clause- Fix doc path

* elbrujohalcon.293.single_maybe_clause- Fix doc path

* elbrujohalcon.293.single_maybe_clause- Fix macro

* elbrujohalcon.293.single_maybe_clause- add feature flag

* elbrujohalcon.293.single_maybe_clause- Adjust line numbers

* elbrujohalcon.293.single_maybe_clause- Update docs to the latest style trend ✨

* elbrujohalcon.293.single_maybe_clause- Manually cherry-pick changes from #397

* Revert task name change

* Make documentation easier to follow with icons (#413)

* Fix support version range

* Make it so rules are identified in a simpler manner

* Example > Example configuration

* Sort it

* Add missing per-doc elements

* Make it easier to follow (more icons, less text)

* Fix it for consistency

* Fix per linter

* Fix post- code review

* Fix when running it on ourselves

* Same-case them (upper at start of word) and sort them

* Identify it better

* Remove non-existing ruleset

* Trim a bit frmo the top

* Add some history to the documentation (#417)

* Fix #418: New Rule: `no_nested_hrls` (#429)

* Spot some issues with `elvis.config` (non-existing modules, non-existing rules) (#397)

add elvis_config validation

* Some minor tweaks for `andalso`/`orelse` "ambiguity" (#437)

* Use parens when either A or B, from "A andalso B", is not "simple"

* Simplify it for readability

* Use parens when either A or B, from "A orelse B", is not "simple"

* Make sure A and B, from A andalso/orelse B, are both booleans

This also introduces more readability

* Tweak it around not, when close to andalso/orelse

* Consistently have , (instead of andalso) in guards

* Consistently have ; (instead of orelse) in guards

* Act on review suggestion: make it simpler

* Revert changes on parens

* Untangle expression

* Fix it

* Try with a fixed plugin version

* Propose a few changes to (the codebase's) readability and shared elements (#442)

* Introduce elvis_ktn, and arity/1

* Introduce elvis_ktn:location/1, elvis_ktn:line/1

* Introduce elvis_ktn:name/1

* rebar3 fmt it!

* Increase consistency (and reduce definitions) for is_..._node

* Approach functions

* Introduce elvis_ktn:operation/1

* Introduce elvis_ktn:text/1

* Introduce elvis_ktn:tokens/1, elvis_ktn:value/1

* Introduce elvis_ktn:function/1

* Introduce elvis_ktn:module/1

* Introduce elvis_ktn:pattern/1

* Reuse what's available

* Rename it for consistency

* Create is_..._node functions for consistency

* Further simplify the predicates

* Be consistent with 'not'

* Fix it per tests

* Revert based on self-review

* Get rid of elvis_ktn:arity/1

* Get rid of elvis_ktn:function/1

* Get rid of elvis_ktn:line/1

* Get rid of elvis_ktn:location/1

* Get rid of elvis_ktn:module/1

* Get rid of elvis_ktn:name/1

* Get rid of elvis_ktn:operation/1

* Get rid of elvis_ktn:pattern/1

* Get rid of elvis_ktn:text/1

* Get rid of elvis_ktn:tokens/1

* Get rid of elvis_ktn:value/1 (and with it, the module it's in)

* Reduce number of changes (when not relevant, except for naming)

* Move `case ... is_..._` back to `case ... ktn_code:type(...`

* Reduce to single-call functions that aren't reused

* Test an alternative on simplification

* Signal stuff for follow-up

* Make for consistency: move predicate to only place it's used

* Update some more, to get a feel of the end result

* Prefer strict equivalence

* Continue on our path to ~glory~ simplicity

* Move predication definitions closer to where they're used

* Increase consistency

* Name our predicates

* Fix `operator_spaces` for [`=`, `=>`, `:=`, `<-`, `<=`], while adding `?=` to it, too (#446)

Fix operator_spaces on [`=`, `=>`, `:=`, `<-`, `<=`]

...  while adding `?=` too

* Add `{gen_statem, call, 2}`, `{gen_server, call, 2}`, and `{gen_event, call, 3}` to option `caveat_functions` in rule `no_common_caveats_call` (#450)

Fix new function calls for No Common Caveats

* Improve `macro_module_names`' test suite (increase it with elements from a report) (#449)

Add report code to check that currently we don't have an issue

* Simplify `elvis_code` (#447)

* Remove dead code

* Simplify function_naming_convention

Drop "generic" (only used once) functions and replace
inside the _rule definition_

* Simplify god_modules, export_used_types, and max_function_arity

Drop "generic" (used 3 times) functions and replace
inside the _rule definition_

* Simplify export_used_types, and private_data_types

Drop "generic" (used 2 times) functions and replace
inside the _rule definition_

* Move some more "not so generic" code next to its implementation

* Simplify it

* Simplify for defaults

* Remove unused doc-specific indications

* Complement doc. for elvis_code

* Remove not-especially-useful doc. content from elvis_core

* Make it consistent for elvis_result

* Further simplify code in elvis_text_style

* Simplify it

* Fix `no_boolean_in_comparison`: adds [`=:=`, `/=`, `=/=`] (#448)

* Add to tests stuff that should fail (while adjusting lineno)

* Fix it per our latest expectations

* Act on dogfooding results

* Rethink it

* Simplify it further, by being sneaky (?)

* Update katana-code and remove dialyzer attribute (#452)

* Rely on `beam_files` for pre-processed -related analysis (`no_debug_call`, `invalid_dynamic_call`, ...) (#451)

* Fix `prefer_unquoted_atoms` (match better) (#455)

* Simplify matching on prefer_unquoted_atom

Avoid a list of reserved words and compares as per Erlang/OTP's atom
definition

* Act on dogfooding results

* Reduce number of differences to actual code

* New rulesets: `hrl_files_strict` and `beam_files_strict` (#453)

* Document `beam_files` and upcoming `beam_files_strict`

* Signal hrl_files (and upcoming hrl_files_strict) better

* Make it easier to maintain and reason on

We propose:
- a single function for rules (since they're now defined the
  same way in functions)
- functions ..._rules where we compose for what we want
  (no repetition)

This allows us to e.g.:
- identify HRL-only rules (which lead to a documentation update)
- that we were missing some text_style rules in the strict group
- that we known easily what doesn't work on BEAM (can compare to docs)

* Remove test that makes less sense now we're composing stuff

* "Pay" the price of making it more consistent (or tweaking it)

* Act on further test results

* Tweak it because even if available it might not be applicable

* Remove unnecessary config. option

* Fix doc

* Have elvis_ruleset (was elvis_rulesets) be a behaviour

* Expand list comprehensions to ease readability

* Sort it

* Allow for OTP behaviours to bypass `export_used_types` (#457)

* Don't repeat yourself

* Rename it for clarity

* Don't act on export_used_types for known OTP behaviours

* Lint `elvis_core` further (#456)

* Fix gitignore rules (return is not {ok, _})

* Fix per gitignore rules' results

* Allow for beam-only analysis to be more complete

* Dogfood further

This allowed us to find minor stuff we missed before

* Reuse code when possible (minor tweak/fix to `elvis_file:module/1`) (#458)

* Add `list_to_atom/1` and `binary_to_atom/1,2` to rule `no_common_caveats_call`'s option `caveat_functions` (default) (#464)

* Add list_to_atom/1 and binary_to_atom/1,2 to no_common_caveats_call

* Avoid some, fix some

* Approach it from a safer angle

* A few minor fixes around documentation and moving towards OTP 28 (#465)

* Fix doc.s (extraneous `)`)

* Fix lists as per code (increase consistency)

* Already prepare for what OTP 28 will propose we do

* Fix missing reference

* Remove macros that our support range doesn't require

* Fix #427: Improve invalid_dynamic_call (#467)

* Further code reviews on #467 (#468)

* Add `{dbg, '_'}, {dyntrace, '_'}, {instrument, '_'}` to `no_debug_call` (#471)

Increase elements we consider to be `debug_calls`

* Fix #426: New rule: no_receive_without_timeout (#472)

* Add `{left, "."}, {left, ";"}` to `no_space`; add `{right, ";"}` to `operator_spaces` (#470)

* Add `left, .` to `no_space` (default)

* Add `left, ;` to `no_space` (default)

* Add `right, ;` to `operator_spaces` (default)

* Act on self-review: more doc

* Handle left-of better

* Test further

* Support OTP 28 (#466)

* Support OTP 28

* rebar3 upgrade it!

* Simplify it

* rebar3 upgrade it!

* Add `<:=`, `<:-`, and `&&` (`left` and `right`) to rule `operator_spaces` (#463)

* Support OTP 28

* rebar3 upgrade it!

* Simplify it

* rebar3 upgrade it!

* Add support for OTP 28's newest generators in operator_spaces

---------

Co-authored-by: Brujo Benavides <elbrujohalcon@gmail.com>

* Fix badge link and support range (#474)

* Alternative fix for #476 (#479)

* Fix #481: Improve comparison for no_operation_on_same_value (#483)

* Fix #484: Properly show include filenames in no_nested_hrls (#485)

* Attempt to fix crash in export_used_types (#489)

* Propose a more consistent output message format (and hopefully simpler coding of future rules) (#475)

* Add forbidden_regex to macro_names (#492)

* Move `& `  to `$ `  in documentation (#502)

Move `& ` to `$ ` in documentation

* Tweak: further simplification in the code base (#500)

* Simplify it for default values

* Allow for new find_by_types/4 (with filter)

* Simplify further patterns

* Continue the pursuit for patterns

* Fix doc where lacking

* Update/remove spec/type where unwarranted

* Stay the course of simplification

* Propose a way to simplify writing rules: first pass

* Find further defaults and common patterns we can tweak

* Propose a way to simplify writing rules: second pass

* New format: no_nested_hrls

* New format: no_specs

* New format: no_block_expressions (introduces tokens_as_content/1)

* New format: no_macros

* New format: macro_names

* New format: no_types

* New format: no_if_expressions

* Fix elvis_code:find/1 (typespec) and stop reversing list

Results are already sorted at the end, in any case

* Tweak specs a bit (add more zipper support)

I want to review no_opaque at the end alone

* New format: used_ignored_vars

* New format: no_behavior_info

* New format: invalid_dynamic_call

* New format: no_spec_with_records

* Minor format changes

* New format: max_function_clause_length

* Fix reading options for max_function_clause_length

We're already using ?FUNCTION_NAME elsewhere and this is a good
way of avoiding this category of issues

* New format: max_function_length

* Tweak a few messages (make limits more explicit)

* New format: no_nested_try_catch

* New format: no_successive_maps

* Simplify for already-tested condition

* New format: no_init_lists

* New format: ms_transform_included

* New format: no_boolean_in_comparison

* New format: no_receive_without_timeout

* New format: no_operation_on_same_value

* New format: no_throw

* New format: no_dollar_space

* New format: no_author

* New format: no_import

* New format: no_catch_expressions

* New format: no_single_clause_case

* New format: behaviour_spelling

* New format: param_pattern_matching

* New format: consistent_generic_type

* New format: always_shortcircuit

* Remove unnecessary reference to generic doc.

* New format: module_naming_convention

* New format: max_module_length

* New format: max_anonymous_function_arity

* New format: max_function_arity

* New format: no_single_match_maybe

* New format: no_match_in_condition

* New format: export_used_types

* New format: private_data_types

* Prevent copy-paste errors (and also tightly couple rule and rule name)

* Vastly simplify the :find API

* Review code that was left for review later

* New format: function_naming_convention

* New function: variable_naming_convention

* New format: atom_naming_convention

* Minor tweaks to comments and docs

* Improve in preparation for further tweak operations

* Let rebar3 control the output of compilation errors

* New format: no_space_after_pound, no_space, operator_spaces

* New format: nesting_level

* Handle regex in similar manner across the board

We implement:

1. pre-compilation for faster results
2. tweaks to outputs, that stemmed from test on oddities
3. a re-invention of forbidden_regex for macro_names

* Allow Dialyzer to know when we're breaking opacity or not

* New format: god_modules

* New format: state_record_and_type

* New format: no_call, no_debug_call, no_common_caveats_call

(via no_call_common)

* New format: numeric_format

* New format: consistent_variable_casing

* Put it back again: concentrate on important stuff

* New format: dont_repeat_yourself (and drop some specs)

* Fix printing dont_repeat_yourself output

* Act on self-review

* Finalise it for review

* Fix it for OTP 26

* Act on self-review

* Make it more explicit where we find compulsory-ness

* code_zipper > zipper, as per review comment

* Improve (internal) API consistency, as per review comment

* Make it more generic, as per review comment

* Trim it, as per review comment

* Simplify it, as per review comment

* Remove dead code, as per review comment

* Remove function, as per review comment

* Rename some of the rules (#505)

* Rename god_modules as no_god_modules

* Rename nesting_level as no_deep_nesting

* Rename invalid_dynamic_call as no_invalid_dynamic_calls

* Rename used_ignored_variable as no_used_ignored_variables

* Rename macro_names as macro_naming_convention

* Rename consistent_generic_type as generic_type

* Rename consistent_variable_casing as variable_casing

* Deprecate old_configuration_format

* Minor fix for better visual results

* Update README examples per more recent output

* Drop src_dirs > dirs normalization as pre-1.0.0 worry

* Identify behavior-related exports closer to home

* Make reusable stuff reusable (and tweak variable names)

* Drop "map not list" config. normalization as pre-1.0.0 worry

* Drop seemingly dead code (I searched elvis and rebar3_lint, too)

* Fix typo

* Renaming for clarity around ruleset/rule

* Move non-generic stuff out of "generic" module

* Distinguish between rule set and rule namespace

These are mentioned in the README and should easily be
distinguished:

- a rule namespace is just a module implementing a rule definition
- a rule set is a number of rules, from any module, with a given
  config

* Make rules opaque

* Tweak the README

I'll later implement a warning around this syntax
while keeping the previous behavior

* Tweak some of our types

* Act on review comments

* #462: New Rule: guard_operators (#506)

* [#462] Add docs and tests

* Add [some] code

* Fix #462: New rule: guard_operators

* Fix rebase

* Adjust for OTP26

* Reduce line length

* Don't test on beam_files rules that are OTP27+

* Revert bad changes

* #462 guard_operators fixes (#507)

* Add ruleset for tests(#435)

Add a new ruleset, designed for test files
This ruleset now includes all of the default `.erl` rules, except `dont_repeat_yourself` and `no_god_modules`.
Run Elvis on test files.

* #461: New rule: simplify_anonymous_functions (#511)

* #461: New rule: simplify_anonymous_functions

* Remove unneeded clarification

* Simplify code even further

* Update doc_rules/elvis_style/simplify_anonymous_functions.md

Co-authored-by: Paulo F. Oliveira <paulo.ferraz.oliveira@gmail.com>

* Update src/elvis_style.erl

Co-authored-by: Paulo F. Oliveira <paulo.ferraz.oliveira@gmail.com>

* Fix md

---------

Co-authored-by: Paulo F. Oliveira <paulo.ferraz.oliveira@gmail.com>

* Allow catch expressions if the result is discarded (#512)

* Allow catch expressions if the result is discarded

* Improve documentation

* Move prefer_unquoted_atoms to elvis_style (#513)

* Move prefer_unquoted_atoms to elvis_style

* Note about previous rule NS

* #487 New rule: Prefer Include (#514)

* Rename no_nested_hrls as no_includes (#519)

* Rename no_nested_hrls as no_includes

* Remove unneeded text

* Handle named funs in all rules (#523)

* Fix #431: New strict rule: strict_term_equivalence (#524)

* Fix #431: New strict rule: strict_term_equivalence

* 🐩

* Add more tests

* New Rules for anonymous function lengths (#522)

* New Rules for anonymous function lengths

* Adjust defaults

* Fixes from #532 review (#525)

* Apply all the OTP24 patches

---------

Co-authored-by: Paulo F. Oliveira <paulo.ferraz.oliveira@gmail.com>
Co-authored-by: Bór Milán <71042542+bormilan@users.noreply.github.com>
Co-authored-by: Benedikt Reinartz <filmor@gmail.com>