MFH: r520358 textproc/py-charset: Fix test target

Fix test invocation with pytest 4.x [1], which was failing with:

  if len(param.values) != len(argnames):
E   TypeError: object of type 'MarkDecorator' has no len()

While here, fix out of order MASTER_SITES

[1] https://github.com/chardet/chardet/pull/174

Approved by: portmgr (blanket: ports compliance)

Approved by: ports-secteam (blanket(s): bugfix, ports compliance)