Change --additional_file_patterns to use dash instead of underscore

Other flags use dash instead of underscore. Changing it for consistency.

Author: drwl

lib/annotate/parser.rb

@@ -49,18 +49,14 @@ def add_options_to_parser(option_parser) # rubocop:disable Metrics/MethodLength
 
       option_parser.banner = 'Usage: annotate [options] [model_file]*'
 
-      option_parser.on('--additional_file_patterns path1,path2,path3', Array, "Additional file paths or globs to annotate, separated by commas (e.g. `/foo/bar/%model_name%/*.rb,/baz/%model_name%.rb`)") do |additional_file_patterns|
+      option_parser.on('--additional-file-patterns path1,path2,path3', Array, "Additional file paths or globs to annotate, separated by commas (e.g. `/foo/bar/%model_name%/*.rb,/baz/%model_name%.rb`)") do |additional_file_patterns|
         ENV['additional_file_patterns'] = additional_file_patterns
       end
 
       option_parser.on('-d', '--delete', 'Remove annotations from all model files or the routes.rb file') do
         @options[:target_action] = :remove_annotations
       end
 
-      option_parser.on('--additional_file_patterns path1,path2,path3', Array, "Additional file paths or globs to annotate") do |additional_file_patterns|
-        ENV['additional_file_patterns'] = additional_file_patterns
-      end
-
       option_parser.on('-p', '--position [before|top|after|bottom]', positions,
                        'Place the annotations at the top (before) or the bottom (after) of the model/test/fixture/factory/route/serializer file(s)') do |p|
         env['position'] = p

spec/lib/annotate/parser_spec.rb

@@ -14,7 +14,7 @@ module Annotate # rubocop:disable Metrics/ModuleLength
       end
     end
 
-    %w[--additional_file_patterns].each do |option|
+    %w[--additional-file-patterns].each do |option|
       describe option do
         it 'sets array of paths to :additional_file_patterns' do
           # options = "-a ${('foo/bar' 'baz')}"