K 10
svn:author
V 4
ngie
K 8
svn:date
V 27
2019-04-23T22:37:49.390697Z
K 7
svn:log
V 909
KATParser: don't leak `self.fp`

As noted by the python 3 interpreter, self.fp is leaked every time KATParser
is called (it raises a `ResourceWarning`).

Refactor KATParser in order to not leak `self.fp`:

* Don't allocate `self.fp` in `__init__()`. Doing so requires adding
  `self.fp.close()`, and as noted before, makes for very fragile code when the
  interpreter is tearing down objects (it can result in crashes in some
  interpreter versions if triggered with the right conditions). Limit `self.fp`
  allocation/use to context suites ("the with statement") instead, as this is
  more likely to not cause non-deterministic weirdness issues with the
  interpreter.
* Rename `__iter__` to `__next__` as it was providing `__next__` support and
  return the KATParser object instead with `__iter__`, as `__iter__` is meant
  to return an iterator and `__next__` is meant to help iterate over an
  iterator.

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