"http" in URLs should not be captured as keys

[ashaw]

Currently,

noturls: value
urls:
http://foo.com
http://bar.com
:end

is parsed as

{
  "noturls": "value",
  "urls": "",
  "http": "//bar.com"
}

Desired result is:

{
  "noturls": "value",
  "urls": "http://foo.com\nhttp://bar.com"
}

I realize you can quote the URLs to escape them, but maybe the START_KEY regex should be changed to forbid "//" after a colon so file patterns are not captured as keys, since it's such a common usage. Just a thought.