Re: Regex to divide document into sections?

Hmm... doesn't seem to work for me.

  a  #=> [["This is an example.\n    a = 1\nOf what I mean.\n    b = 2\nAnd 
it can go on\nlike this.\n\n    c = 3\nFor ever and ever.\n\n    d = 4\n", 
"\n\n   "]]

You know what though. I did some benchmarking and discovered that manually 
parsing the text line by line is much faster than using a regular 
expression (I used a close approx re). I was kind of surprised by this, 
since the regular expression engine is written in C, where as my line by 
line parser is in Ruby.

Despite that, I still find it curious that there isn't a more obvious 
regular expression for parsing a document in this way. It makes me wonder 
if a C.S. PhD could go back to the drawing board, and come up with a better 
alternative to REs.