lib/fakefs/pathname.rb
def each_line(*args, &block) # :yield: line
      if block_given?
        File.open(@path, 'r') do |io|
          io.each_line(*args, &block)
        end
      else
        enum_for(:each_line, *args)
      end
    end
def each_line(*args, &block) # :yield: line
      if block_given?
        File.open(@path, 'r') do |io|
          io.each_line(*args, &block)
        end
      else
        enum_for(:each_line, *args)
      end
    end
* IO *

 #each_line iterates over the line in the file.
 It yields a String object for each line.

 This method has existed since 1.8.1.