Chunk Ruby guides by theme

I tried to extract some themes out of the Ruby guides and chunked a few chunks:

- Stuff I didn't touch
- method definitions/signature
- variables/params

Author: MatheusRich

ruby/README.md

@@ -9,12 +9,8 @@
 - [Use an opinionated set of rules for Rubocop](Use-an-opinionated-set-of-rules-for-Rubocop.md)
 - [Limit use of conditional modifiers to short, simple cases](Limit-use-of-conditional-modifiers-to-short-simple-cases.md)
 - Avoid multiple assignments per line (`one, two = 1, 2`). [#109]
-- Avoid organizational comments (`# Validations`). [#63]
 - Avoid ternary operators (`boolean ? true : false`). Use multi-line `if`
   instead to emphasize code branches. [36491dbb9]
-- Avoid bang (!) method names. Prefer descriptive names. [#122]
-- Name variables created by a factory after the factory (`user_factory` creates
-  `user`).
 - Prefer nested class and module definitions over the shorthand version
   [Example](/ruby/sample_1.rb#L103) [#332]
 - Prefer `detect` over `find`. [0d819844]
@@ -23,28 +19,37 @@
 - Prefer `reduce` over `inject`. [#237]
 - Prefer `&:method_name` to `{ |item| item.method_name }` for simple method
   calls. [#183]
-- Use `_` for unused block parameters. [0d819844]
-- Prefix unused variables or parameters with underscore (`_`). [#335]
-- Suffix variables holding a factory with `_factory` (`user_factory`).
-- Use a leading underscore when defining instance variables for memoization.
-  [#373]
 - Use `%()` for single-line strings containing double-quotes that require
   interpolation. [36491dbb9]
-- Use `?` suffix for predicate methods. [0d819844]
-- Use `def self.method`, not `class << self`. [40090e22]
-- Use `def` with parentheses when there are arguments. [36491dbb9]
 - Use heredocs for multi-line strings. [36491dbb9]
-- Order class methods above instance methods. [#320]
-- Prefer method invocation over instance variables. [#331]
-- Avoid optional parameters. Does the method do too much?
 - Avoid monkey-patching.
 - Generate necessary [Bundler binstubs] for the project, such as `rake` and
   `rspec`, and add them to version control.
 - Prefer classes to modules when designing functionality that is shared by
   multiple models.
+- Avoid organizational comments (`# Validations`). [#63]
+- Use empty lines around multi-line blocks.
+
+---
+
+- Avoid bang (!) method names. Prefer descriptive names. [#122]
+- Use `?` suffix for predicate methods. [0d819844]
+- Use `def self.method`, not `class << self`. [40090e22]
+- Use `def` with parentheses when there are arguments. [36491dbb9]
+- Avoid optional parameters. Does the method do too much?
+- Order class methods above instance methods. [#320]
 - Prefer `private` when indicating scope. Use `protected` only with comparison
   methods like `def ==(other)`, `def <(other)`, and `def >(other)`.
-- Use empty lines around multi-line blocks.
+
+---
+
+- Prefix unused variables or parameters with underscore (`_`). [#335]
+- Name variables created by a factory after the factory (`user_factory` creates
+  `user`).
+- Suffix variables holding a factory with `_factory` (`user_factory`).
+- Use a leading underscore when defining instance variables for memoization.
+  [#373]
+- Prefer method invocation over instance variables. [#331]
 
 [#63]: https://github.com/thoughtbot/guides/pull/63
 [#109]: https://github.com/thoughtbot/guides/pull/109