From db1de35a3138ffecc6210a9dd5a26880390ef60a Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 26 Jan 2018 03:41:04 +0000
Subject: [PATCH] optparse.rb: froze string literals

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62047 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/optparse.rb               | 8 ++++----
 test/optparse/test_summary.rb | 9 +++++++++
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/lib/optparse.rb b/lib/optparse.rb
index 7d366a7353..11b122de95 100644
--- a/lib/optparse.rb
+++ b/lib/optparse.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 #
 # optparse.rb - command-line option analysis with the OptionParser class.
 #
@@ -577,7 +577,7 @@ class OptionParser
       while s = lopts.shift
         l = left[-1].length + s.length
         l += arg.length if left.size == 1 && arg
-        l < max or sopts.empty? or left << ''
+        l < max or sopts.empty? or left << +''
         left[-1] << (left[-1].empty? ? ' ' * 4 : ', ') << s
       end
 
@@ -1136,7 +1136,7 @@ XXX
   #
   def banner
     unless @banner
-      @banner = "Usage: #{program_name} [options]"
+      @banner = +"Usage: #{program_name} [options]"
       visit(:add_banner, @banner)
     end
     @banner
@@ -1180,7 +1180,7 @@ XXX
   #
   def ver
     if v = version
-      str = "#{program_name} #{[v].join('.')}"
+      str = +"#{program_name} #{[v].join('.')}"
       str << " (#{v})" if v = release
       str
     end
diff --git a/test/optparse/test_summary.rb b/test/optparse/test_summary.rb
index b743aa00c1..2f389a3535 100644
--- a/test/optparse/test_summary.rb
+++ b/test/optparse/test_summary.rb
@@ -44,4 +44,13 @@ class TestOptionParser::SummaryTest < TestOptionParser
     assert_equal("foo bar\n", o.to_s, bug6348)
     assert_equal(["foo bar"], o.to_a, bug6348)
   end
+
+  def test_ver
+    o = OptionParser.new("foo bar")
+    o.program_name = "foo"
+    o.version = [0, 1]
+    assert_equal "foo 0.1", o.ver
+    o.release = "rel"
+    assert_equal "foo 0.1 (rel)", o.ver
+  end
 end