Fix issue #187 (#189)

* Avoid using `tap` with structs

* Remove extraneous blank lines

* Readability

src/ameba.cr

@@ -20,7 +20,6 @@ require "./ameba/formatter/*"
 #
 # Ameba.run config
 # ```
-#
 module Ameba
   extend self
 
@@ -35,7 +34,6 @@ module Ameba
   # Ameba.run
   # Ameba.run config
   # ```
-  #
   def run(config = Config.load)
     Runner.new(config).run
   end

src/ameba/ast/util.cr

@@ -97,7 +97,6 @@ module Ameba::AST::Util
   # ```
   #
   # That's because not all branches return(i.e. `else` is missing).
-  #
   def flow_expression?(node, in_loop = false)
     return true if flow_command? node, in_loop
 

src/ameba/cli/cmd.cr

@@ -121,10 +121,16 @@ module Ameba::Cli
   private def configure_rules(config, opts)
     case
     when only = opts.only
-      config.rules.map! &.tap(&.enabled = false)
+      config.rules.map! do |rule|
+        rule.enabled = false
+        rule
+      end
       config.update_rules(only, enabled: true)
     when opts.all?
-      config.rules.map! &.tap(&.enabled = true)
+      config.rules.map! do |rule|
+        rule.enabled = true
+        rule
+      end
     end
     config.update_rules(opts.except, enabled: false)
   end

src/ameba/config.cr

@@ -75,7 +75,6 @@ class Ameba::Config
   # ```
   # config = Ameba::Config.load
   # ```
-  #
   def self.load(path = PATH, colors = true)
     Colorize.enabled = colors
     content = File.exists?(path) ? File.read path : "{}"
@@ -97,7 +96,6 @@ class Ameba::Config
   # config.excluded = ["spec"]
   # config.sources # => list of sources pointing to files found by the wildcards
   # ```
-  #
   def sources
     (find_files_by_globs(globs) - find_files_by_globs(excluded))
       .map { |path| Source.new File.read(path), path }
@@ -122,7 +120,6 @@ class Ameba::Config
   # config = Ameba::Config.load
   # config.formatter = :progress
   # ```
-  #
   def formatter=(name : String | Symbol)
     if f = AVAILABLE_FORMATTERS[name]?
       @formatter = f.new
@@ -137,7 +134,6 @@ class Ameba::Config
   # config = Ameba::Config.load
   # config.update_rule "MyRuleName", enabled: false
   # ```
-  #
   def update_rule(name, enabled = true, excluded = nil)
     index = @rules.index { |rule| rule.name == name }
     raise ArgumentError.new("Rule `#{name}` does not exist") unless index
@@ -160,7 +156,6 @@ class Ameba::Config
   # ```
   # config.update_rules %w(Group1 Group2), enabled: true
   # ```
-  #
   def update_rules(names, **args)
     names.try &.each do |name|
       if group = @rule_groups[name]?

src/ameba/rule/base.cr

@@ -26,7 +26,6 @@ module Ameba::Rule
   # Enforces rules to implement an abstract `#test` method which
   # is designed to test the source passed in. If source has issues
   # that are tested by this rule, it should add an issue.
-  #
   abstract struct Base
     include Config::RuleConfig
 
@@ -51,7 +50,7 @@ module Ameba::Rule
     # source.valid?
     # ```
     def catch(source : Source)
-      source.tap { |s| test s }
+      source.tap { test source }
     end
 
     # Returns a name of this rule, which is basically a class name.
@@ -151,8 +150,11 @@ module Ameba::Rule
     # ```
     def self.parsed_doc
       source = File.read(path_to_source_file)
-      nodes = Crystal::Parser.new(source).tap(&.wants_doc = true).parse
+      nodes = Crystal::Parser.new(source)
+        .tap(&.wants_doc = true)
+        .parse
       type_name = rule_name.split('/').last?
+
       DocFinder.new(nodes, type_name).doc
     end
 
@@ -185,7 +187,6 @@ module Ameba::Rule
   # ```
   # Ameba::Rule.rules # => [Rule1, Rule2, ....]
   # ```
-  #
   def self.rules
     Base.subclasses
   end