From 44f56a077369b5e32674ece240211071de6176ae Mon Sep 17 00:00:00 2001
From: Markus Reiter <me@reitermark.us>
Date: Thu, 14 Jun 2018 22:48:37 +0200
Subject: [PATCH] Refactor `join("")` to `join`.

---
 Library/Homebrew/rubocops/extend/formula_cop.rb      | 2 +-
 Library/Homebrew/test/cask/download_strategy_spec.rb | 2 +-
 Library/Homebrew/test/cask/dsl_spec.rb               | 2 +-
 Library/Homebrew/test/cask/pkg_spec.rb               | 2 +-
 Library/Homebrew/test/cask/system_command_spec.rb    | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/Library/Homebrew/rubocops/extend/formula_cop.rb b/Library/Homebrew/rubocops/extend/formula_cop.rb
index 02bbb7c6d9..362a5134c0 100644
--- a/Library/Homebrew/rubocops/extend/formula_cop.rb
+++ b/Library/Homebrew/rubocops/extend/formula_cop.rb
@@ -460,7 +460,7 @@ module RuboCop
         when :str
           node.str_content
         when :dstr
-          node.each_child_node(:str).map(&:str_content).join("")
+          node.each_child_node(:str).map(&:str_content).join
         when :const
           node.const_name
         when :sym
diff --git a/Library/Homebrew/test/cask/download_strategy_spec.rb b/Library/Homebrew/test/cask/download_strategy_spec.rb
index ed8cd01ef6..3a69edaaf4 100644
--- a/Library/Homebrew/test/cask/download_strategy_spec.rb
+++ b/Library/Homebrew/test/cask/download_strategy_spec.rb
@@ -148,7 +148,7 @@ describe "download strategies", :cask do
           "DBw2KdR24q9t1wfjS9LUzelf5TWk6ojj8p9%2FHjl%2Fi%2FVCXN",
           "N4o1mW%2FMayy2tTY1qcC%2FTmqI1ulZS8SNuaSgr9Iys9oDF1%2",
           "BPK%2B4Sg==",
-        ].join("")
+        ].join
       end
 
       describe "#tarball_path" do
diff --git a/Library/Homebrew/test/cask/dsl_spec.rb b/Library/Homebrew/test/cask/dsl_spec.rb
index 67fcb027a8..2500a53fa3 100644
--- a/Library/Homebrew/test/cask/dsl_spec.rb
+++ b/Library/Homebrew/test/cask/dsl_spec.rb
@@ -20,7 +20,7 @@ describe Hbc::DSL, :cask do
     }
 
     it "prints a warning that it has encountered an unexpected method" do
-      expected = Regexp.compile(<<~EOS.lines.map(&:chomp).join(""))
+      expected = Regexp.compile(<<~EOS.lines.map(&:chomp).join)
         (?m)
         Warning:
         .*
diff --git a/Library/Homebrew/test/cask/pkg_spec.rb b/Library/Homebrew/test/cask/pkg_spec.rb
index f92d6854e2..6a7247058e 100644
--- a/Library/Homebrew/test/cask/pkg_spec.rb
+++ b/Library/Homebrew/test/cask/pkg_spec.rb
@@ -134,7 +134,7 @@ describe Hbc::Pkg, :cask do
           <string>#{volume}</string>
           <key>paths</key>
           <dict>
-            #{(pkg_files + pkg_directories).map { |f| "<key>#{f}</key><dict></dict>" }.join("")}
+            #{(pkg_files + pkg_directories).map { |f| "<key>#{f}</key><dict></dict>" }.join}
           </dict>
         </dict>
         </plist>
diff --git a/Library/Homebrew/test/cask/system_command_spec.rb b/Library/Homebrew/test/cask/system_command_spec.rb
index 6899d4fa65..6e7397931f 100644
--- a/Library/Homebrew/test/cask/system_command_spec.rb
+++ b/Library/Homebrew/test/cask/system_command_spec.rb
@@ -109,7 +109,7 @@ describe Hbc::SystemCommand, :cask do
       end
 
       it "echoes only STDOUT" do
-        expected = [1, 3, 5].map { |i| "#{i}\n" }.join("")
+        expected = [1, 3, 5].map { |i| "#{i}\n" }.join
         expect {
           described_class.run(command, options)
         }.to output(expected).to_stdout