Prefer `frozen_string_literal: true`.

10 files changed, 16 insertions, 17 deletions

diff --git a/lib/openssl.rb b/lib/openssl.rb
index 1dd5faa7..7ba2229a 100644
--- a/lib/openssl.rb
+++ b/lib/openssl.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 =begin
 = Info
   'OpenSSL for Ruby 2' project
diff --git a/lib/openssl/bn.rb b/lib/openssl/bn.rb
index 8d1ebefb..0a5e11b4 100644
--- a/lib/openssl/bn.rb
+++ b/lib/openssl/bn.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 #--
 #
 # = Ruby-space definitions that completes C-space funcs for BN
diff --git a/lib/openssl/buffering.rb b/lib/openssl/buffering.rb
index 5d1586e5..5d0ed3b6 100644
--- a/lib/openssl/buffering.rb
+++ b/lib/openssl/buffering.rb
@@ -1,5 +1,5 @@
 # coding: binary
-# frozen_string_literal: false
+# frozen_string_literal: true
 #--
 #= Info
 #  'OpenSSL for Ruby 2' project
@@ -40,7 +40,7 @@ module OpenSSL::Buffering
   def initialize(*)
     super
     @eof = false
-    @rbuffer = ""
+    @rbuffer = String.new
     @sync = @io.sync
   end
 
@@ -312,7 +312,7 @@ module OpenSSL::Buffering
   # buffer is flushed to the underlying socket.
 
   def do_write(s)
-    @wbuffer = "" unless defined? @wbuffer
+    @wbuffer = String.new unless defined? @wbuffer
     @wbuffer << s
     @wbuffer.force_encoding(Encoding::BINARY)
     @sync ||= false
@@ -398,7 +398,7 @@ module OpenSSL::Buffering
   # See IO#puts for full details.
 
   def puts(*args)
-    s = ""
+    s = String.new
     if args.empty?
       s << "\n"
     end
@@ -416,7 +416,7 @@ module OpenSSL::Buffering
   # See IO#print for full details.
 
   def print(*args)
-    s = ""
+    s = String.new
     args.each{ |arg| s << arg.to_s }
     do_write(s)
     nil
diff --git a/lib/openssl/cipher.rb b/lib/openssl/cipher.rb
index af721b3a..8ad8c35d 100644
--- a/lib/openssl/cipher.rb
+++ b/lib/openssl/cipher.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 #--
 # = Ruby-space predefined Cipher subclasses
 #
diff --git a/lib/openssl/config.rb b/lib/openssl/config.rb
index 48d8be00..ef83c57b 100644
--- a/lib/openssl/config.rb
+++ b/lib/openssl/config.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 =begin
 = Ruby-space definitions that completes C-space funcs for Config
 
@@ -53,9 +53,8 @@ module OpenSSL
       def parse_config(io)
         begin
           parse_config_lines(io)
-        rescue ConfigError => e
-          e.message.replace("error in line #{io.lineno}: " + e.message)
-          raise
+        rescue => error
+          raise ConfigError, "error in line #{io.lineno}: " + error.message
         end
       end
 
diff --git a/lib/openssl/digest.rb b/lib/openssl/digest.rb
index 810c2ebe..c9539119 100644
--- a/lib/openssl/digest.rb
+++ b/lib/openssl/digest.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 #--
 # = Ruby-space predefined Digest subclasses
 #
diff --git a/lib/openssl/pkcs5.rb b/lib/openssl/pkcs5.rb
index 959447df..8dedc4be 100644
--- a/lib/openssl/pkcs5.rb
+++ b/lib/openssl/pkcs5.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 #--
 # Ruby/OpenSSL Project
 # Copyright (C) 2017 Ruby/OpenSSL Project Authors
diff --git a/lib/openssl/pkey.rb b/lib/openssl/pkey.rb
index 8a547c34..ecb112f7 100644
--- a/lib/openssl/pkey.rb
+++ b/lib/openssl/pkey.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 #--
 # Ruby/OpenSSL Project
 # Copyright (C) 2017 Ruby/OpenSSL Project Authors
diff --git a/lib/openssl/ssl.rb b/lib/openssl/ssl.rb
index 96fad7c4..8554ada0 100644
--- a/lib/openssl/ssl.rb
+++ b/lib/openssl/ssl.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 =begin
 = Info
   'OpenSSL for Ruby 2' project
diff --git a/lib/openssl/x509.rb b/lib/openssl/x509.rb
index aa29fbe5..1d2a5aac 100644
--- a/lib/openssl/x509.rb
+++ b/lib/openssl/x509.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 #--
 # = Ruby-space definitions that completes C-space funcs for X509 and subclasses
 #