Merge pull request #7015 from hoshinotsuyoshi/fix_6880

[Fix #6880] Fix RuboCop::Options#parse for `.rubocop` file parsing

CHANGELOG.md

@@ -10,6 +10,7 @@
 * [#6900](https://github.com/rubocop-hq/rubocop/issues/6900): Fix `Rails/TimeZone` autocorrect `Time.current` to `Time.zone.now`. ([@vfonic][])
 * [#6900](https://github.com/rubocop-hq/rubocop/issues/6900): Fix `Rails/TimeZone` to prefer `Time.zone.#{method}` over other acceptable corrections. ([@vfonic][])
 * [#7007](https://github.com/rubocop-hq/rubocop/pull/7007): Fix `Style/BlockDelimiters` with `braces_for_chaining` style false positive, when chaining using safe navigation. ([@Darhazer][])
+* [#6880](https://github.com/rubocop-hq/rubocop/issues/6880): Fix `.rubocop` file parsing. ([@hoshinotsuyoshi][])
 
 ## 0.68.1 (2019-04-30)
 

lib/rubocop/options.rb

@@ -45,7 +45,7 @@ def parse(command_line_args)
 
     def args_from_file
       if File.exist?('.rubocop') && !File.directory?('.rubocop')
-        IO.readlines('.rubocop').map(&:strip)
+        File.read('.rubocop').shellsplit
       else
         []
       end

spec/rubocop/options_spec.rb

@@ -346,7 +346,7 @@ def with_env_options(options)
 
     context '.rubocop file' do
       before do
-        create_file('.rubocop', %w[--color --fail-level C])
+        create_file('.rubocop', '--color --fail-level C')
       end
 
       it 'has lower precedence then command line options' do
@@ -378,7 +378,7 @@ def with_env_options(options)
       end
 
       it 'has higher precedence then options from .rubocop file' do
-        create_file('.rubocop', %w[--color --fail-level C])
+        create_file('.rubocop', '--color --fail-level C')
 
         with_env_options '--fail-level W' do
           expect(parsed_options).to eq(color: false, fail_level: :warning)