test_cppformat.h:36: Expected …, found ("0,500000" != 0.500000) test_cppformat.h:37: Expected …, found ("0,1" != 0.1)
This test varies behaviour by locale, which caused the test to fail on osx by default.
This probably failed on Linux as well, depending on the locale of the host. The
current test fixture seems to expect US-notation, so I've fixed it to that locale.