slavapestov/factor — pull request #990 by bjourne (2014-02-10 02:04:34+00:00)
Title: formatting: new format specifier for unparsed representation

Pr that adds a new format specifier `"%u" sprintf` which I've occasionally needed. Often you have a factor object which doesn't implement `present` but you still want to print it. Then you would use this format specifier.