Write the example file reliably in the readme
Write the example file reliably in the readme

The previous way doesn't work on PyPy or Jython, and emits warnings in recent python3s.
mloesch/tablib,klothe/tablib,steveb/tablib,zhengzhihust/tablib,klothe/tablib,tommyanthony/tablib,enzochiau/tablib,steveb/tablib,screwt/tablib,mloesch/tablib,bopo/tablib,kennethreitz/tablib,leohmoraes/tablib,screwt/tablib,godfreyy/tablib,leohmoraes/tablib,godfreyy/tablib,whix/tablib,whix/tablib,zhengzhihust/tablib,enzochiau/tablib,bopo/tablib