a kind of humorous euphemism, for handling http errors
Sometimes errors happen. Being humorous about it, or making them pretty, is what the heck does.
See this web app for example use.
Actually, there are no tests yet.
However astrolin.org and other web apps
heck and test for some errors. So, if the above build status is green
heck is working. If it's red, it's not for sure that the issue is