remove_empty_head_lines

# File lib/rdoc/parsers/parse_f95.rb, line 1621
    def remove_empty_head_lines(text)
      return "" unless text
      lines = text.split("\n")
      header = true
      lines.delete_if{ |line|
        header = false if /\S/ =~ line
        header && /^\s*?$/ =~ line
      }
      lines.join("\n")
    end