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I believe the patch produces the following as the first sentence
"When a module named :mod:`spam` is imported, the interpreter searches for a file named :file:`spam.py` in a list of directories given by the variable ``sys.path`` which is initialized from the directory containing the input script (or the current directory), :envvar:`PYTHONPATH` (a list of directory names, with the same syntax as the shell variable :envvar:`PATH`) and the installation-dependent default."
This is more that a 'mouthful', especially for a tutorial, and I think is should be split into two:
variable ``sys.path``. ``Sys.path`` is initialized ...