[ruby/rdoc] Improve rubocop setup

(https://github.com/ruby/rdoc/pull/1139)

* Rename rake rubocop to rake format_generated_files

* Add rubocop rules to ensure spaces are applied consistently

* Improve rubocop related CI workflows

https://github.com/ruby/rdoc/commit/27932d001c

lib/rdoc/code_object/alias.rb

@@ -70,7 +70,7 @@ class RDoc::Alias < RDoc::CodeObject
   # HTML id-friendly version of +#new_name+.
 
   def html_name
-    CGI.escape(@new_name.gsub('-', '-2D')).gsub('%','-').sub(/^-/, '')
+    CGI.escape(@new_name.gsub('-', '-2D')).gsub('%', '-').sub(/^-/, '')
   end
 
   def inspect # :nodoc:

lib/rdoc/code_object/method_attr.rb

@@ -268,8 +268,8 @@ class RDoc::MethodAttr < RDoc::CodeObject
       when 'const_get' then 'const'
       when 'new' then
         $1.split('::').last.  # ClassName => class_name
-          gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2').
+          gsub(/([A-Z]+)([A-Z][a-z])/, '\1_\2').
-          gsub(/([a-z\d])([A-Z])/,'\1_\2').
+          gsub(/([a-z\d])([A-Z])/, '\1_\2').
           downcase
       else
         $2
@@ -291,7 +291,7 @@ class RDoc::MethodAttr < RDoc::CodeObject
   def html_name
     require 'cgi/util'
 
-    CGI.escape(@name.gsub('-', '-2D')).gsub('%','-').sub(/^-/, '')
+    CGI.escape(@name.gsub('-', '-2D')).gsub('%', '-').sub(/^-/, '')
   end
 
   ##

lib/rdoc/code_object/top_level.rb

@@ -183,8 +183,8 @@ class RDoc::TopLevel < RDoc::Context
     "#<%s:0x%x %p modules: %p classes: %p>" % [
       self.class, object_id,
       base_name,
-      @modules.map { |n,m| m },
+      @modules.map { |n, m| m },
-      @classes.map { |n,c| c }
+      @classes.map { |n, c| c }
     ]
   end
 
@@ -254,8 +254,8 @@ class RDoc::TopLevel < RDoc::Context
       q.text "base name: #{base_name.inspect}"
       q.breakable
 
-      items = @modules.map { |n,m| m }
+      items = @modules.map { |n, m| m }
-      items.concat @modules.map { |n,c| c }
+      items.concat @modules.map { |n, c| c }
       q.seplist items do |mod| q.pp mod end
     end
   end

lib/rdoc/generator/pot/message_extractor.rb

@@ -29,7 +29,7 @@ class RDoc::Generator::POT::MessageExtractor
     extract_text(klass.comment_location, klass.full_name)
 
     klass.each_section do |section, constants, attributes|
-      extract_text(section.title ,"#{klass.full_name}: section title")
+      extract_text(section.title, "#{klass.full_name}: section title")
       section.comments.each do |comment|
         extract_text(comment, "#{klass.full_name}: #{section.title}")
       end

lib/rdoc/markup/attribute_manager.rb

@@ -260,7 +260,7 @@ class RDoc::Markup::AttributeManager
 
   def add_word_pair(start, stop, name, exclusive = false)
     raise ArgumentError, "Word flags may not start with '<'" if
-      start[0,1] == '<'
+      start[0, 1] == '<'
 
     bitmap = @attributes.bitmap_for name
 
@@ -271,7 +271,7 @@ class RDoc::Markup::AttributeManager
       @word_pair_map[pattern] = bitmap
     end
 
-    @protectable << start[0,1]
+    @protectable << start[0, 1]
     @protectable.uniq!
 
     @exclusive_bitmap |= bitmap if exclusive

lib/rdoc/markup/to_bs.rb

@@ -24,7 +24,7 @@ class RDoc::Markup::ToBs < RDoc::Markup::ToRdoc
   def init_tags
     add_tag :BOLD, '+b', '-b'
     add_tag :EM,   '+_', '-_'
-    add_tag :TT,   ''  , ''   # we need in_tt information maintained
+    add_tag :TT,   '', ''   # we need in_tt information maintained
   end
 
   ##

lib/rdoc/options.rb

@@ -683,7 +683,7 @@ Usage: #{opt.program_name} [options] [names...]
 
       EOF
 
-      parsers = Hash.new { |h,parser| h[parser] = [] }
+      parsers = Hash.new { |h, parser| h[parser] = [] }
 
       RDoc::Parser.parsers.each do |regexp, parser|
         parsers[parser.name.sub('RDoc::Parser::', '')] << regexp.source

lib/rdoc/parser/c.rb

@@ -440,7 +440,7 @@ class RDoc::Parser::C < RDoc::Parser
   # Scans #content for rb_include_module
 
   def do_includes
-    @content.scan(/rb_include_module\s*\(\s*(\w+?),\s*(\w+?)\s*\)/) do |c,m|
+    @content.scan(/rb_include_module\s*\(\s*(\w+?),\s*(\w+?)\s*\)/) do |c, m|
       next unless cls = @classes[c]
       m = @known_classes[m] || m
 

lib/rdoc/parser/changelog.rb

@@ -193,7 +193,7 @@ class RDoc::Parser::ChangeLog < RDoc::Parser
 
     entries << [entry_name, entry_body] if entry_name
 
-    entries.reject! do |(entry,_)|
+    entries.reject! do |(entry, _)|
       entry == nil
     end