chore: Address warning: literal string will be frozen in the future

Author: yahonda

Diff for: google-apis-core/lib/google/apis/core/composite_io.rb

@@ -42,7 +42,7 @@ def initialize(*ios)
         end
 
         def read(length = nil, buf = nil)
-          buf = buf ? buf.replace('') : ''
+          buf = buf ? buf.replace('') : ''.dup
 
           begin
             io = @ios[@index]

Diff for: google-apis-core/lib/google/apis/core/download.rb

@@ -46,7 +46,7 @@ def prepare!
             @download_io = File.open(download_dest, 'wb')
             @close_io_on_finish = true
           else
-            @download_io = StringIO.new('', 'wb')
+            @download_io = StringIO.new(''.dup, 'wb')
             @close_io_on_finish = false
           end
           super

Diff for: google-apis-core/lib/google/apis/core/http_command.rb

@@ -283,7 +283,7 @@ def success(result, &block)
         # @yield [nil, err] if block given
         # @raise [StandardError] if no block
         def error(err, rethrow: false, &block)
-          logger.debug { sprintf('Error - %s', PP.pp(err, '')) }
+          logger.debug { sprintf('Error - %s', PP.pp(err, ''.dup)) }
           if err.is_a?(HTTPClient::BadResponseError)
             begin
               res = err.res
@@ -385,15 +385,15 @@ class RedactingSingleLine < PP::SingleLine
         end
 
         def safe_pretty_representation obj
-          out = ""
+          out = "".dup
           printer = RedactingPP.new out, 79
           printer.guard_inspect_key { printer.pp obj }
           printer.flush
           out << "\n"
         end
 
         def safe_single_line_representation obj
-          out = ""
+          out = "".dup
           printer = RedactingSingleLine.new out
           printer.guard_inspect_key { printer.pp obj }
           printer.flush

Diff for: google-apis-core/lib/google/apis/core/multipart.rb

@@ -31,7 +31,7 @@ def initialize(value, header = {})
         end
 
         def to_io(boundary)
-          part = ''
+          part = ''.dup
           part << "--#{boundary}\r\n"
           part << "Content-Type: application/json\r\n"
           @header.each do |(k, v)|
@@ -59,7 +59,7 @@ def initialize(io, header = {})
         end
 
         def to_io(boundary)
-          head = ''
+          head = ''.dup
           head << "--#{boundary}\r\n"
           @header.each do |(k, v)|
             head << "#{k}: #{v}\r\n"

Diff for: google-apis-core/lib/google/apis/errors.rb

@@ -43,7 +43,7 @@ def backtrace
       end
 
       def inspect
-        extra = ""
+        extra = "".dup
         extra << " status_code: #{status_code.inspect}" unless status_code.nil?
         extra << " header: #{header.inspect}"           unless header.nil?
         extra << " body: #{body.inspect}"               unless body.nil?