kazu	2017-01-11 23:48:51 +0900 (Wed, 11 Jan 2017)

  New Revision: 57306

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=57306

  Log:
    lib/net/protocol.rb: Specify frozen_string_literal: true.

  Modified files:
    trunk/lib/net/protocol.rb
    trunk/test/net/protocol/test_protocol.rb
Index: lib/net/protocol.rb
===================================================================
--- lib/net/protocol.rb	(revision 57305)
+++ lib/net/protocol.rb	(revision 57306)
@@ -1,4 +1,4 @@ https://github.com/ruby/ruby/blob/trunk/lib/net/protocol.rb#L1
-# frozen_string_literal: false
+# frozen_string_literal: true
 #
 # = net/protocol.rb
 #
@@ -84,7 +84,7 @@ module Net # :nodoc: https://github.com/ruby/ruby/blob/trunk/lib/net/protocol.rb#L84
       @read_timeout = read_timeout
       @continue_timeout = continue_timeout
       @debug_output = debug_output
-      @rbuf = ''
+      @rbuf = ''.dup
     end
 
     attr_reader :io
@@ -114,7 +114,7 @@ module Net # :nodoc: https://github.com/ruby/ruby/blob/trunk/lib/net/protocol.rb#L114
 
     public
 
-    def read(len, dest = '', ignore_eof = false)
+    def read(len, dest = ''.dup, ignore_eof = false)
       LOG "reading #{len} bytes..."
       read_bytes = 0
       begin
@@ -132,7 +132,7 @@ module Net # :nodoc: https://github.com/ruby/ruby/blob/trunk/lib/net/protocol.rb#L132
       dest
     end
 
-    def read_all(dest = '')
+    def read_all(dest = ''.dup)
       LOG 'reading all...'
       read_bytes = 0
       begin
@@ -331,7 +331,7 @@ module Net # :nodoc: https://github.com/ruby/ruby/blob/trunk/lib/net/protocol.rb#L331
     end
 
     def using_each_crlf_line
-      @wbuf = ''
+      @wbuf = ''.dup
       yield
       if not @wbuf.empty?   # unterminated last line
         write0 dot_stuff(@wbuf.chomp) + "\r\n"
Index: test/net/protocol/test_protocol.rb
===================================================================
--- test/net/protocol/test_protocol.rb	(revision 57305)
+++ test/net/protocol/test_protocol.rb	(revision 57306)
@@ -1,4 +1,4 @@ https://github.com/ruby/ruby/blob/trunk/test/net/protocol/test_protocol.rb#L1
-# frozen_string_literal: false
+# frozen_string_literal: true
 require "test/unit"
 require "net/protocol"
 require "stringio"
@@ -6,7 +6,7 @@ require "stringio" https://github.com/ruby/ruby/blob/trunk/test/net/protocol/test_protocol.rb#L6
 class TestProtocol < Test::Unit::TestCase
   def test_should_properly_dot_stuff_period_with_no_endline
     bug9627 = '[ruby-core:61441] [Bug #9627]'
-    sio = StringIO.new("")
+    sio = StringIO.new("".dup)
     imio = Net::InternetMessageIO.new(sio)
     email = "To: bob@a...\nlook, a period with no endline\n."
     imio.write_message(email)
@@ -15,12 +15,12 @@ class TestProtocol < Test::Unit::TestCas https://github.com/ruby/ruby/blob/trunk/test/net/protocol/test_protocol.rb#L15
 
   def test_each_crlf_line
     assert_output('', '') do
-      sio = StringIO.new("")
+      sio = StringIO.new("".dup)
       imio = Net::InternetMessageIO.new(sio)
       assert_equal(23, imio.write_message("\u3042\r\u3044\n\u3046\r\n\u3048"))
       assert_equal("\u3042\r\n\u3044\r\n\u3046\r\n\u3048\r\n.\r\n", sio.string)
 
-      sio = StringIO.new("")
+      sio = StringIO.new("".dup)
       imio = Net::InternetMessageIO.new(sio)
       assert_equal(8, imio.write_message("\u3042\r"))
       assert_equal("\u3042\r\n.\r\n", sio.string)

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