Repos have syntax errors

[srush]

Several of the repos that I have played with start with a syntax error. Think we should avoid syntax errors when possible.

ImportError while loading conftest '/testbed/tests/conftest.py'.
tests/conftest.py:5: in <module>
    from jinja2 import loaders
src/jinja2/__init__.py:6: in <module>
    from .bccache import BytecodeCache as BytecodeCache
E     File "/testbed/src/jinja2/bccache.py", line 26
E       bc_version = 5
E   IndentationError: expected an indented block after class definition on line 25

[srush]

ImportError while loading conftest '/testbed/tests/conftest.py'.
tests/conftest.py:3: in <module>
    import simpy
src/simpy/__init__.py:16: in <module>
    from simpy.core import Environment
src/simpy/core.py:49: in <module>
    class Environment:
src/simpy/core.py:99: in Environment
    process = BoundClass(Process)
E   TypeError: BoundClass() takes no arguments

[wenting-zhao]

This one is hard to fully resolved. As we discussed, sometimes a function being imported in tests may be removed entirely. However, I did the following to remove a subset of the errors:

1. don't touch special functions that start with __ and end with __, so functions like init would be untouched
2. if all functions under a class are removed, add a pass statement to the class

The two specific errors you pointed out here are solved.

Changes are done in the build_dataset repo. I have updated the docker images on docker hub for the updated repos.

Later if we have further ideas on how to better handle errors, lmk.

[srush]

Failed imports are okay, think it's mostly errors of the first type (bad indents) that I think we can avoid.