# File lib/maruku/input/parse_span_better.rb, line 384
        def read_simple(src, escaped, exit_on_chars, exit_on_strings=nil)
                text = ""
                while true
#                       puts "Reading simple #{text.inspect}"
                        c = src.cur_char
                        if exit_on_chars && exit_on_chars.include?(c)
#                               src.ignore_char if eat_delim
                                break
                        end
                        
                        break if exit_on_strings && 
                                exit_on_strings.any? {|x| src.cur_chars_are x}
                        
                        case c
                        when nil
                                s= "String finished while reading (break on "+
                                "#{exit_on_chars.map{|x|""<<x}.inspect})"+
                                " already read: #{text.inspect}"
                                maruku_error s, src
                                maruku_recover "I boldly continue", src
                                break
                        when ?\\
                                d = src.next_char
                                if escaped.include? d
                                        src.ignore_chars(2)
                                        text << d
                                else
                                        text << src.shift_char
                                end
                        else 
                                text << src.shift_char
                        end
                end
#               puts "Read simple #{text.inspect}"
                text.empty? ? nil : text
        end