cli/args: simplify initialisation.

Move some logic from `CLI::Parser` to `CLI::Args` to simplify and make
more consistent the initialisation process.

Library/Homebrew/cli/args.rb

@@ -9,10 +9,12 @@ module Homebrew
       # undefine tap to allow --tap argument
       undef tap
 
-      def initialize(argv:)
+      def initialize
         super
-        @argv = argv
-        @cmdline_args = argv
+
+        self[:remaining] = []
+        self[:cmdline_args] = ARGV_WITHOUT_MONKEY_PATCHING.dup
+
         @args_parsed = false
         @processed_options = []
       end
@@ -60,8 +62,6 @@ module Homebrew
       end
 
       def named
-        return [] if remaining.nil?
-
         remaining
       end
 

Library/Homebrew/cli/parser.rb

@@ -37,11 +37,10 @@ module Homebrew
         }
       end
 
-      def initialize(args = ARGV, &block)
+      def initialize(&block)
         @parser = OptionParser.new
-        @args = Homebrew::CLI::Args.new(argv: ARGV_WITHOUT_MONKEY_PATCHING)
-        @args[:remaining] = []
-        @args[:cmdline_args] = args.dup
+        @args = Homebrew::CLI::Args.new
+
         @constraints = []
         @conflicts = []
         @switch_sources = {}

Library/Homebrew/global.rb

@@ -86,7 +86,7 @@ module Homebrew
     end
 
     def args
-      @args ||= CLI::Args.new(argv: ARGV_WITHOUT_MONKEY_PATCHING)
+      @args ||= CLI::Args.new
     end
 
     def messages