Tweak the changes to puturl() so that it will pass the standard Markdown test suite.
Tweak the changes to puturl() so that it will pass the standard
Markdown test suite.

binki/discount,gm2bv/discount,gm2bv/discount,OliverLetterer/discount,gm2bv/discount,OliverLetterer/discount,davidfstr/discount,gm2bv/discount,binki/discount,binki/discount,davidfstr/discount,davidfstr/discount,OliverLetterer/discount,binki/discount,davidfstr/discount,binki/discount