Initialize instance variables and use attr_writer.

Rake 11 runs with Ruby warnings enabled by default. - Initialize instance variables. - Addresses: 'warning: instance variable @[variable name] not initialized' - Replace `attr_accessor` with `attr_writer` to avoid redefining the `attr_reader`. - Addresses: 'warning: method redefined; discarding old [method name]'

Author: xwmx

lib/pandoc-ruby.rb

@@ -71,24 +71,24 @@ def self.convert(*args)
  new(*args).convert
  end
 
- attr_accessor :options
+ attr_writer :options
  def options
- @options || []
+ @options ||= []
  end
 
- attr_accessor :option_string
+ attr_writer :option_string
  def option_string
- @option_string || ''
+ @option_string ||= ''
  end
 
- attr_accessor :binary_output
+ attr_writer :binary_output
  def binary_output
- @binary_output || false
+ @binary_output ||= false
  end
 
- attr_accessor :writer
+ attr_writer :writer
  def writer
- @writer || 'html'
+ @writer ||= 'html'
  end
 
  # Create a new PandocRuby converter object. The first argument contains the
@@ -101,6 +101,9 @@ def writer
  # new(["/path/to/file.md"], :option1 => :value, :option2)
  # new(["/to/file1.html", "/to/file2.html"], :option1 => :value)
  def initialize(*args)
+ @input_string = nil
+ @input_files = nil
+
  if args[0].is_a?(String)
  @input_string = args.shift
  elsif args[0].is_a?(Array)